Well, I tried it and it didn't work out.
Did the 12416 beta update with the hard drive detached, upon boot it told me it needed an additional 190MB to finish installing, skipped that. Previously backed up games play fine. ACB did not ask for an update, but AP25 failed (disc unreadable, reflected in Xval).
XBOX 360 Elite 120G (Jasper)
MFR 2009-09-26 LOT 0939X
LiteOn 93450C + iX 1.6 NS
K 2.0.12416.0 BK 2.0.1888.0
Don't care for LIVE as long as my offline box is not crippled, will play around more and report if any side effects pop up.
Edit: Well, perfect timing... I just f*cked up my console and then saw there's a workaround. Hope you other guys have luck with that other solution...
This post has been edited by supernes: Nov 20 2010, 07:07 PM