I'm sure these have been answered many times.. but... :-)

I received an oregon 300 yesterday in anticipation of a trip to Thailand and Cambodia that I am departing for this weekend.

This is my very first gps and I'm looking forward to figuring out how to create/upload custom maps. For now, I have a few questions about installing the cambodia map.

1. Which mapsource do I need?
2. Should I just simply stick with uploading the .img file mentioned in this thread already? (I have downloaded the keygen already).

thanks for the hard work!

Mike