Jon at rentzsch.com was having trouble getting Tiger installed on his MacBook Pro. Specifically, the DVD wouldn't mount in his MBP, though it did work in other machines (CDs mounted without a problem, too). With his machine's temperature issues in mind, he stuck the MBP and DVD in the refrigerator, let them sit for 45 minutes and then, presto! It worked.
AppleMacBook Pro 15-inch with Retina Display (mid 2014)