I don’t leave the screen on, giving longer battery life, only check it when I’m at a junction. Thanks for the RAM reccomendation.
Directions for importing gpx files:
1. download the file to your computer
2. attach one file per email and send to firstname.lastname@example.org
3. you receive a reply email, open it on your iphone.
4. On your iphone click the link provided in the email
5. it automatically opens MotionX and gives you a summary of the files to import
6. select "import now" – done!