Don't worry, @datareen - You didn't damage any hardware on your laptop by the failed BIOS flash. And you did good research and troubleshooting to see if you could resolve the issue yourself.
From what I've read previously, a failed BIOS flash should be covered by your ASUS Warranty. You should have no out-of-pocket expense for your issue.
ASUS Live Update sets up unknowing users for heartache by offering BIOS flash updates from NTFS, so they shouldn't fault you for the attempt.
PM Mason@ASUS on this forum if you need any assistance in setting the record straight with ASUS.
G74SX-A1 - stock hardware - BIOS 202 - 2nd Monitor VISIO VF551XVT