Did you take a look at the GPS Info if it show you fixed sats? On MapThis click start and select GPS Info. You'll need to wait until 3 sats comes fixed (with more sats, more accuracy are your pinning location and info as speed). All times I've used it worked well.
Try putting MapThis in GAME folder (I have a PSP 2k with same FW and use it in this folder).
Bookmarks