Best to burn to a DVD-R at lowest possible speed. If disc is not recognised on first insertion, eject and try again a couple of times. If still not accepted by the unit re-burn using another burner and/or different software. Only use good quality media and always at the lowest possible burn speed. DVD+RW may also be suitable [only tested on C2 V19].
Great post praxos, rep+ added along with [the perhaps fleeting] Hero status for being the first to post this elusive ISO. Thx.