Okay, so my hunt for a good Windows Mobile 2003 driver for my SMC 2642W/Axim X5 took me far, near, and in between, and I ended up collecting and testing a whole bunch of drivers. So, what did I do with my knowledge? I built a new driver set out of the various binaries that I found with the latest (compatable) version of each of the driver components I could find. What does that leave? Perfect Prism and Perfect Prism Lite. Perfect Prism has the Intersil control panel and a nice Windows Mobile 2003 compatable driver. Perfect Prism Lite dumps the cruddy control panel and installs only the driver, so you can get up and running quickly. It's the last known version of the firmware and driver, and the second to last known version of the control panel.
http://tjtech.org/prism
Enjoy!
(Note to mods: I doubt it, but you might consider this to be illegal software, please read the Legal Issues note on the website below, and feel free to remove this post if you still feel that it is violating the rules, thanks!)
EDIT: Perhaps the PocketPC forum is a better place for this?