This is from another help site (I can give you the link), and I have used this method 
with success several times:
Removing Programs listed in the Control Panel's "Add/Remove Programs" Section 
If you remove an installed program and its files by deleting the files, it may still 
be listed in the Add/Remove Programs in Control Panel. To remove it from the list: 

Start the Registry Editor  (Go to Start--Run--regedit)
Open HKEY_LOCAL_MACHINE \ Software \ Microsoft \ Windows \ CurrentVersion \ Uninstall 
Delete the program entry here 
Close the registry editor and restart Windows 
Note: This can also be achieved with TweakUI, one of Microsoft's PowerToys 








On Friday, December 19, 2003 at 2:25 pm, David Fuller wrote:
>I have a question about Clear 
>Unwanted Entries from Add/Remove Programs:

>I have two names that I would like to clear, but always get a box up with the following 
>message. An error occurred while trying to remove (program name).Uninstallation 
has 
>been cancelled.
>

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