Ouch,... So much to read.
About ESR-Support in ule. I'm not against it, not inany way and the standard-path as external-ELF is mainly like in FMCB, so no real waste of code.
EEUG give me some info about that about 2 1/2 years ago.
There was an example (I found on google) from M.R.Brown "Mr. Brown", which explains, how to decrypt and run DVD-Player from (E)ROM.
"UDFIO" and some things help finding this,...
If I find the link, I'll post it quickly.
I think, next FMCB-Release-Source will help.
I'm not sure if Jimmi uses the same, or a similar method.
PS2 V7/DMS3 V2 (FW:2.4b7); Seagate Baracuda 200GB
PS2 V7/CC1.0 (FW:34 hacked v2 BM:2.1.6); Maxtor DiamondMAX9 PLUS 160GB
PS2 SCPH-30004R; NoMod+NoLaser
3xSony MC 8MB
MAX/Datel 16MB with Boot-CD
Custom FMCB 1.8b+ Beta-Build, my AIO 0.5, Sony&xRhino-Linux