WAIT!!! I wana hear what "bad experiance" u had first

first off , if you cannot uninstall from add remove program it means your installation is curroped, to me it seam u are looking for a unninstall.msi in the tweakvista folder?
have u tryed add remove program.
have you tryed to reinstall incase an installation curroption occured? I cant see how bad this program could have been for you unless u seriously dont know what your doing and played around with tweaks that you should not have been playing with..beside there is always restore points.. hence u cannot go wrong.