I thiink you wil have to alter the registry but I cannot remember exactly which entry. It is one that deals with the file associations but googling registry file associations or something like that...

There are a number of good registry cleaners around.try www. Iobit.com.
Then remove the folder inwhich hte offending program is and then use the registry cleaner.
M

30 years have said to me if it isnt broke dont mend it. if 2003 does what yu need dont get the hassle to going future 2007!
M

try and install Firefox, good, simple, stable and then when running you can delete and reinstall IE7
M

admin password is often 'admin'... but when I am really stuck like this is use a linux bootable CD and canthen access the hard disk from that running in memory. You can download an IOS file of linux...