is there anyway i can delete these files from my computer?

i installed once some games like Word Wizard Deluxe,Ticker Tycoon and i deleted them but not with the Add/remove programs (or with uninstal) and now i have them in the add/remove programs list and i cant delete them from the list and i cant uninstall them.I tried to install them again but they make another uninstall program in the list and the older one reamains there.And the same happend to gamespy arcade i deleted it with uninstall and now i still have it in the add/remove programs list and i cant uninstall it.IS there any way i can delete them from the registry?or is there a program with the help i can delete those files?Help please

the only way is to try and see if you can re-install them over the files and then try to unistall again

[this might not work if any of the files used in install are 'locked']