diff --git a/tamper/equaltolike.py b/tamper/equaltolike.py
index 2c9c55d3c..ae983dada 100644
--- a/tamper/equaltolike.py
+++ b/tamper/equaltolike.py
@@ -17,7 +17,7 @@ from lib.core.enums import PRIORITY
 __priority__ = PRIORITY.HIGHEST
 
 def dependencies():
-    singleTimeWarnMessage("tamper script '%s' is unlikely to work against %s" % (os.path.basename(__file__)[:-3], DBMS.PGSQL))
+    singleTimeWarnMessage("tamper script '%s' is unlikely to work against %s" % (os.path.basename(__file__).split(".")[0], DBMS.PGSQL))
 
 def tamper(payload):
     """
diff --git a/tamper/halfversionedmorekeywords.py b/tamper/halfversionedmorekeywords.py
index 4eef80031..c61a083c5 100644
--- a/tamper/halfversionedmorekeywords.py
+++ b/tamper/halfversionedmorekeywords.py
@@ -19,7 +19,7 @@ from lib.core.settings import IGNORE_SPACE_AFFECTED_KEYWORDS
 __priority__ = PRIORITY.HIGHER
 
 def dependencies():
-    singleTimeWarnMessage("tamper script '%s' is only meant to be run against %s < 5.0" % (os.path.basename(__file__)[:-3], DBMS.MYSQL))
+    singleTimeWarnMessage("tamper script '%s' is only meant to be run against %s < 5.1" % (os.path.basename(__file__).split(".")[0], DBMS.MYSQL))
 
 def tamper(payload):
     """
@@ -30,10 +30,10 @@ def tamper(payload):
         * Output: value'/*!0UNION/*!0ALL/*!0SELECT/*!0CONCAT(/*!0CHAR(58,107,112,113,58),/*!0IFNULL(CAST(/*!0CURRENT_USER()/*!0AS/*!0CHAR),/*!0CHAR(32)),/*!0CHAR(58,97,110,121,58)), NULL, NULL#/*!0AND 'QDWa'='QDWa
 
     Requirement:
-        * MySQL < 5.0
+        * MySQL < 5.1
 
     Tested against:
-        * MySQL 4.0.18
+        * MySQL 4.0.18, 5.0.22
 
     Notes:
         * Useful to bypass several web application firewalls when the
diff --git a/tamper/percentage.py b/tamper/percentage.py
new file mode 100644
index 000000000..ef61eadd1
--- /dev/null
+++ b/tamper/percentage.py
@@ -0,0 +1,56 @@
+#!/usr/bin/env python
+
+"""
+$Id$
+
+Copyright (c) 2006-2011 sqlmap developers (http://www.sqlmap.org/)
+See the file 'doc/COPYING' for copying permission
+"""
+
+import os
+import string
+
+from lib.core.enums import PRIORITY
+from lib.core.common import singleTimeWarnMessage
+
+__priority__ = PRIORITY.LOW
+
+def dependencies():
+    singleTimeWarnMessage("tamper script '%s' is only meant to be run against ASP web applications" % os.path.basename(__file__).split(".")[0])
+
+def tamper(payload):
+    """
+    Adds a percentage sign ('%') infront of each character
+
+    Example:
+        * Input: SELECT FIELD FROM TABLE
+        * Output: %S%E%L%E%C%T %F%I%E%L%D %F%R%O%M %T%A%B%L%E
+
+    Requirement:
+        * ASP
+
+    Tested against:
+        * Microsoft SQL Server 2000, 2005
+        * MySQL 5.1.56, 5.5.11
+        * PostgreSQL 9.0
+
+    Notes:
+        * Useful to bypass weak and bespoke web application firewalls
+    """
+
+    if payload:
+        retVal = ""
+        i = 0
+
+        while i < len(payload):
+            if payload[i] == '%' and (i < len(payload) - 2) and payload[i+1] in string.hexdigits and payload[i+2] in string.hexdigits:
+                retVal += payload[i:i+3]
+                i += 3
+            elif payload[i] != ' ':
+                retVal += '%%%s' % payload[i]
+                i += 1
+            else:
+                retVal += payload[i]
+                i += 1
+
+    return retVal
diff --git a/tamper/space2extrarandomblank.py b/tamper/space2extrarandomblank.py
index d9b08220d..ae5fd54db 100644
--- a/tamper/space2extrarandomblank.py
+++ b/tamper/space2extrarandomblank.py
@@ -17,7 +17,7 @@ from lib.core.enums import PRIORITY
 __priority__ = PRIORITY.LOW
 
 def dependencies():
-    singleTimeWarnMessage("tamper script '%s' is only meant to be run against %s" % (os.path.basename(__file__)[:-3], DBMS.MYSQL))
+    singleTimeWarnMessage("tamper script '%s' is only meant to be run against %s" % (os.path.basename(__file__).split(".")[0], DBMS.MYSQL))
 
 def tamper(payload):
     """
diff --git a/tamper/space2morepound.py b/tamper/space2morepound.py
index 73a3eac8a..99803fbdc 100644
--- a/tamper/space2morepound.py
+++ b/tamper/space2morepound.py
@@ -21,7 +21,7 @@ from lib.core.settings import IGNORE_SPACE_AFFECTED_KEYWORDS
 __priority__ = PRIORITY.LOW
 
 def dependencies():
-    singleTimeWarnMessage("tamper script '%s' is only meant to be run against %s > 5.1.13" % (os.path.basename(__file__)[:-3], DBMS.MYSQL))
+    singleTimeWarnMessage("tamper script '%s' is only meant to be run against %s > 5.1.13" % (os.path.basename(__file__).split(".")[0], DBMS.MYSQL))
 
 def tamper(payload):
     """
@@ -40,6 +40,8 @@ def tamper(payload):
 
     Notes:
         * Useful to bypass several web application firewalls
+        * Used during the ModSecurity SQL injection challenge,
+          http://modsecurity.org/demo/challenge.html
     """
 
     def process(match):
diff --git a/tamper/space2pound.py b/tamper/space2pound.py
index 5cccdf3bd..f3428c08f 100644
--- a/tamper/space2pound.py
+++ b/tamper/space2pound.py
@@ -18,7 +18,7 @@ from lib.core.enums import PRIORITY
 __priority__ = PRIORITY.LOW
 
 def dependencies():
-    singleTimeWarnMessage("tamper script '%s' is only meant to be run against %s" % (os.path.basename(__file__)[:-3], DBMS.MYSQL))
+    singleTimeWarnMessage("tamper script '%s' is only meant to be run against %s" % (os.path.basename(__file__).split(".")[0], DBMS.MYSQL))
 
 def tamper(payload):
     """
@@ -37,6 +37,8 @@ def tamper(payload):
 
     Notes:
         * Useful to bypass several web application firewalls
+        * Used during the ModSecurity SQL injection challenge,
+          http://modsecurity.org/demo/challenge.html
     """
 
     retVal = ""
diff --git a/tamper/versionedkeywords.py b/tamper/versionedkeywords.py
index 2615911bb..b26ee1228 100644
--- a/tamper/versionedkeywords.py
+++ b/tamper/versionedkeywords.py
@@ -18,7 +18,7 @@ from lib.core.enums import PRIORITY
 __priority__ = PRIORITY.HIGHER
 
 def dependencies():
-    singleTimeWarnMessage("tamper script '%s' is only meant to be run against %s" % (os.path.basename(__file__)[:-3], DBMS.MYSQL))
+    singleTimeWarnMessage("tamper script '%s' is only meant to be run against %s" % (os.path.basename(__file__).split(".")[0], DBMS.MYSQL))
 
 def tamper(payload):
     """
@@ -32,9 +32,7 @@ def tamper(payload):
         * MySQL
 
     Tested against:
-        * MySQL 4.0.18
-        * MySQL 5.1.56
-        * MySQL 5.5.11
+        * MySQL 4.0.18, 5.1.56, 5.5.11
 
     Notes:
         * Useful to bypass several web application firewalls when the
diff --git a/tamper/versionedmorekeywords.py b/tamper/versionedmorekeywords.py
index a32a7413c..c8acc93af 100644
--- a/tamper/versionedmorekeywords.py
+++ b/tamper/versionedmorekeywords.py
@@ -19,7 +19,7 @@ from lib.core.settings import IGNORE_SPACE_AFFECTED_KEYWORDS
 __priority__ = PRIORITY.HIGHER
 
 def dependencies():
-    singleTimeWarnMessage("tamper script '%s' is only meant to be run against %s >= 5.1.13" % (os.path.basename(__file__)[:-3], DBMS.MYSQL))
+    singleTimeWarnMessage("tamper script '%s' is only meant to be run against %s >= 5.1.13" % (os.path.basename(__file__).split(".")[0], DBMS.MYSQL))
 
 def tamper(payload):
     """
@@ -33,8 +33,7 @@ def tamper(payload):
         * MySQL >= 5.1.13
 
     Tested against:
-        * MySQL 5.1.56
-        * MySQL 5.5.11
+        * MySQL 5.1.56, 5.5.11
 
     Notes:
         * Useful to bypass several web application firewalls when the