Ok, so I decided to give this a go and am having trouble getting it to work. I followed the instructions and am pretty certain I didn't leave any part out. But roadmap is not showing up in the hijack menu. Here is the end of my boot log

hijack_exec("/drive0/var/gpsapp/gpsapp"), rc=0 (okay)
GPS app started
hijack_exec("/drive0/var/roadmap/roadmapgpsapp"), rc=0 (okay)
** roadmap_file.c, line 315: cannot open file usdir.rdm
** roadmap_dbread.c, line 377: cannot open database file usdir.rdm
## roadmap_locator.c, line 132: cannot open directory database (usdir)
player.cpp : 385:empeg-car 2.00 2003/04/01.
Prolux 4 empeg car - 2.1434 Mar 26 2003
Vcb: 0x4086d000

There are 3 lines there that say the usdir file can't be opened. I put that file on the empeg in the correct place and extracted it and everything. So why cant it open that file?