Maxflyer,
You can delete the entries in Add/Remove programs using Tweakui.
Then delete the relevant program folders in Program Files (or wherever you installed them, although it sounds like this may already be the case).
Then (and this is hardcore - not to be attempted by the faint-hearted and may cause you machine to crash and require a re-install :-( run regedit.
Start>run then type regedit and press OK
Then scroll down to HKEY_LOCAL MACHINE (or similar) and under SOFTWARE you will find entries for the software. Delete these "keys" from the registry.
Done.
Please be very careful if using regedit as it can seriously screw your machine. All the PC magazines recommend you back-up your PC before attempting this, but like all PC users, you have done this already, haven't you
Hope this works.
Regards,
Shuttlebus
P.S. 2nd post tonight... thinks I need to get a life
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Edited for spilling