We recently reported on Art?s GPS for PSP application/mod, and he has re-released his GPSP program and documentation including a detailed parts list and do-it-yourself instructions. Here's the technical mumbo jumbo:

"There is a parts list in the new package, the position fix data is now extracted from an NMEA sentence common to the Garmin and the Sony unit from eBay, the new circuit has no need for the 4.7K resistor tied to +5 Volts because the MCLR is turned off in the pics software. The current limiting resistor is now 22K to better protect the PSP. this is the highest value I tried where it still worked reliably, There are small improvements and bug fixes to the software. The GPSP-V2.zip package is complete, and the original package should be discarded. Cheers, Art."

You can get it in our PSP Download section [here].