No prob, click start>run type in regedit > ok now you will see Registry Editor you will see +HKEY_LOCAL_MACHINE click on the + this will open the drop down look for SOFTWARE open by clicking the + you will soon get the idea keep opening until in Lexmark you find memcard.exe or sim highlight with your mouse copy and post the full line back here.
I hope i have explained this in full, if not please post back no problem, Cybercat :)