Add/Remove Programs List

There are many free- and shareware programs that will do this. Here's one called Add/Remove Cleaner (shareware).

http://distortions.com/software/addrem.htm

You can find some free ones by going to nonags.sully.net, and browse the freeware section. Under General Applications, go to the Power Tools section.

Here's one called JoneSoft Uninstall Cleaner:

http://www.ozemail.com.au/~jaesenj/downloads/jsuic.exe

See KB Article Q247501 which basically entails editing the registery at HKLM\Software\Microsoft\Windows\CurrentVersion\Uninstall each subkey contains an installed program listed in the AddRemove Programs list. Opening the subkeys will reveal the Display Name. Delete the registry key that contains the name of your program.
USE CAUTION IN THE REGISTRY AND BACKUP BEFORE EDITING

Using Regedit open the key below. Under this key will be a number of sub-keys, each representing an installed application.

To see which application each sub-key represents, open it and there should be at least two values 'DisplayName' and 'UninstallString'. 'DisplayName' is the name used in the Add/Remove programs list, and 'UninstallString' is the program used to uninstall the application.

To remove a program from the list you can simple delete the sub-key representing that program.

Key: [HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Uninstall]

Also check out the following link for help with registry keys:
http://www.jsiinc.com/reghack.htm