Depends on game, and what fw you have. If its an ap2.5 enabled game, then you need to upgrade to LT+.
Got LTPlus-benq-v1.1.bin on it. 2 games a mate lent me don't work and just come up with "Play DVD". Original games are OK.
Is it likely that he hasn't patched his game with ABGX360? Also (or alternatively) is it likely I need the new dashboard to play his games? I've already got LT+ (on an old version of the dashboard) and am thinking about leaving that in place while updating to the new dashboard - not sure if that's wise or not.
In future I've no plans to be no xbox live so not too bothered about a ban, but I'd prefer not to.