Default XDA vs Jor 928 - Same hardware omap 710 UPDATING w XDA rom??

Is it possible to update the jornada 928 OS rom with the XDA os rom as I now they use the same chipset???

Will it effect the Radio unit rom (which is probably different).
If updating the os rom and radio rom seperately , how do the ROMS interact>?????

Has anyone tried this on the XDA???

If anyone has both an xda and a jornada 928 or has tried this please let me know ))) It would help a lot of jornada 928 users who dont even have the latest 2002 update.