Microsoft versions -- who can understand them?
It's fine to run any version of Streets on the Axim. It's been a while since I played with the program, but got the PPC version free. I don't remember --maybe it was in the box, but more likely it was a free download from the Microsoft site. I would check this out.
I'm pretty sure the desktop and PPC have to have the same version of the program. You know Microsoft -- always changing the file formats for no good reason.