Just a note: Having a 64bit processor does not get you a 64bit operating system. I may have misread where you are actually using the 64 bit version of Win XP. If you have the X86 (32 bit) version of Win XP then you are on a 32 bit operating system and so that would lead to some of the stuff you were trying with the 64bit files.

I wonder why when you inserted the device into the USB port and the system recognized that you had a new device, it did not go into the install new hardware routing and then located the msi on the CD automatically and install the driver for you. At least then you could have bypassed the MFR auto install GUI and explored the disc to find the actual software installer for your wifi adapter.

That is one of the reasons I finally made the jump directly to Window 7 ultimate 64 bit operating system. You would be amazed at how intuitive it is when you install it at looking at your system and then putting a very effective base driver system on for you. Then in the subsequent update cycles actually getting the correct MFR drivers installed. When I do a fresh install of Win 7, it automatically finds my wireless keyboard and mouse combo and installs the MFR specific driver and software for it. The same for my Logitech HD Cam...GPU, Onboard Sound etc. I do not even need to have my Motherboard CD it does it all.

I need to go back and read more of your post because there are a couple of things I am wondering about your system and I may have missed in your comments. One being if you have a Desktop, why not just go direct from your router? I am assuming then it is out of practical range and you are wanting the wifi connector to get internet or home network access.

Getting late here, I will re-visit this tomorrow.