yup , it's compatible with most Garmin products like Nuvi and StreetPilot. If you have Mapsource, just download the installer , run it on Windows XP, and it should automatically install Philippine Routable as a map option on Mapsource. Be careful not to overwrite maps existing on your SD card. Suggest you use a new one.

if you don't have Mapsource, you'll have to use a program like SendMap20 (also availabel for free) from internet and convert the .img file to GMAPSupp.img which you can copy to SD card GARMIN directory. Suggest you use a new SD card so as not to overwrite other maps you have on old SD card.