1. Download and install AutoHotKey
http://download.cnet.com/AutoHotkey/3000-2084_4-10279446.html2. Run AutoHotkey
3. Modify AutoHotkey.ahk in notepad, adding these two lines. The second line allows you to still use capslock, but it is now mapped to Shift+CapsLock.
Capslock::LButton4. Make other desired changes or removals (see their documentation)
+Capslock::Capslock
5. Re-run AutoHotkey
6. Make AutoHotkey run every time you start you computer by adding a shortcut to your script to the start menu startup folder, as described in the AutoHotkey FAQ:
AutoHotkey FAQYou may also want to reference the following for more information.
MouseClickGood luck!
Remapping Keys and Buttons