since you already have ule installed on dev2 on your matrix system, you can simply replace the boot.elf in hdd0:/__boot/ just like you would on the memory card. Please keep in mind that the dev2 boot.elf must be lower case for it to work. basicly you really don't need to burn any cd's or install images to do this once the dev2 installer has been run like your setup has.
on a side note, if you pulled that uLE dev2 installer from the matrix tutorial at console-exploits, sorry I've been meaning to update that.
If you need help, post a question in the
forums, not my PM inbox. Thank you.