It's not 100% necessary, but I have, for a couple of reasons: -
1. It's probably safer in the long term to have 100% of the ISO burned to disc.
2. When abgx360 is updated, I suspect it may only support Burner Max burned games or ISOs ripped from Burner Max burns, rather than truncated burns/rips.
If you do it, make sure you burn from the original source ISO, not by ripping your truncated burn and then reburning that ISO. It sounds obvious, but I bet some people have done that, lol.
