How to Upgrade mp3 player xid_1312_10 2007-10-11 9.1.52 2005-01-09 so as to run mp4 files? It runs *.amv files, *.JPG, *.mp3, records audio in *.mp3, *.act format but only of short durations, LCD remains "ON" while playing audio, FM, and recording thus reducing battery charge in 1 hour. Please help.

ifi, June 2009