psp navigation?!?!?!

i want to get navigation on my psp and i just got 340 oe-a on my psp, so can i still put navigation on it? also do i have to take apart the psp to get it or would the recievers from ebay solve that? where is the best place to download daniska's map this!?

If you use the receiver that plugs into your usb socket on the psp you wont need to take it apart and you can get map this from this site.