Try cutting down your write speed from MAX to 1/2 the rated speed of the disc. This might not fix the problem but it couldn't hurt. Also breakout the original and rip it to a folder on your hard drive and start with a fresh iso then try to burn it with imageburn
W 18:53:18 User accepted disc space warning and is attempting to overburn! You are burning too much to the disc...reduce your target size to 4400Mb. Using MoserBauer (TDK) and Sony discs...neither on my favorites list. I would give Verbatim a shot. Don't know how far I'd trust this drive either...seems pretty generic and I can't find any firmware or other information about the drive anywhere. Is it an Emprex or BTC drive? Also, unless there is some special setting you need for Vista in Imgburn go to Tools ~ Settings ~ and press the Default radio button ~ OK. Lets reset to the defaults to make sure nothing has gotten mucked around with.