For the record, I was referring (even in the original post) to a blogger from a certain mainstream blog, who even rebated the idea that nokia & microsoft were not "bitter rivals" even when most comments said otherwise. Sorry if anyone though I was referring to them.


I did not know the existence of the Nokia 500, but it sounds like pretty much any other WinCE based PNA -- normally those have a SD card with either some launcher or map application whose .exe you can replace to whatever you want, including a File browser.
I believe this is a safe way to start hacking around it; I'm telling because it's easy to left some of these units bricked -- having a malfunctioning, undocumented or inexistent hard reset feature (my unit's case), or a easy-to-corrupt system image in the NAND chip due to poor protection.
So be careful, but enjoy