SharpKeys is a Registry hack that is used to make certain keys on a keyboard act like other keys. For example, if you accidentally hit Caps Lock often, you could use this utility to map Caps Lock to a Shift key or even turn it off completely. The official release includes support for up to 104 mappings, an extensive list of available keys, and a “Type Key” option to help when managing mappings. As it relies on internal support within Windows NT, Windows 2000, Windows XP, or Windows Server 2003, you must be running one of these OS’s for this Registry hack to work.
Version 1.1 adds support for new keys, including F13-F15 and a bunch of codes that are “undefined” on most US-based keyboards: using Type Key you’ll be able to find the scan code, if you want to map keys that are not on the list by name.
Read: SharpKeys FAQ