Hmm.. how about semi-automagic installation of 3rd party apps into /dev/hda2 (and/or /dev/hdc2 for dual drive empegs). It would be useful if the user could just point to an application directory, and JEmplode could figure it out from there - perhaps reading an ftp .install script containing (eg)

site rw
put gpsapp /programs0/gpsapp
site chmod 755 /programs0/gpsapp
put M50gpsapp /etc/preinit.d/M50gpsapp
site chmod 755 /etc/preinit.d/M50gpsapp
site ro

(Hijack ftp SITE commands should rw and ro the /programsX paritions...although it seems that sometimes my empeg crashes immediately after site ro...)

Gotchas:
We should test for both /programs0 and /etc/preinit.d before running the script. Even if an app is so large that it uses one of the music partitions for data storage - the existance of /programs0 and /etc/preinit.d tells us that the empeg has been prepped for 3rd party apps.
It would be cool if eventually JEmplode could do the prep stage if necessary, but this currently involves either serial or telnet access.