Putting a package together, that can be hotswapped onto a virgin XBOX drive, that uses the EEE to launch Ltools is possible. All the
components are already out there - it's an assembly task.
(and Ltools can be used to change the region for UDE2.)But....
EEE needs an exploitable M$ signed program to launch - before handing control to Ltools.
If you've a PAL v1.6 XBOX with K:5713+, these are in short supply. (If we had an acceptable one, we'd have UDE2 PAL, and the region change would no longer be necessary.)
The only way I can think such an EEE/Ltools package would work would be for the EEE to launch a stripped down, exploitable, HDD flagged, game (MA/SC1) (since K:5713+ doesn't allow the use of legacy dashboard files). - But the use of these
game files would make distribution a problem.
(For more info using games as bootstraps see the posts leading up to this one
here.)