QUOTE(tk_saturn @ Apr 17 2011, 09:35 PM)

Flash360 already does this. All you have to do is rename xell-2f.bin to updslot0.bin and flash.
If that would have been the case, why would somebody release such homebrew?
Its easy, like Razkar already said.
Flash360 handles it correctly for XBReboot Images cause on XBR the XeLL is located at the beginning of a block. You just use updslot0.bin and you are set.
On freeBOOT, XeLL is located in the middle of a block ( Offset 0x95060 to be specific) so you have to read out this and following blocks (11 blocks on small block, 3 blocks on big block in total), inject XeLL to it and write these blocks back.
This tool is made for simplifying this whole process.
@ddxb
Your issues are probably from the incorrect handling of some AVPack IDs.. if you have already the setup to compile your own XeLL build do the following:
1. Take a XeLL build which displays video for you
2. Note the AVPack ID which gets shown by XeLL at boot
3. Put this ID togehter with the correct videomode in xenos_init.c
4. Compile and you have your videomode working correctly