I tried cleaning the lens and burning at 4x...
now it got stuck on "Setting up L0 Data Zone Capacity"
Nothing seemed to be happening, I even got patient and waited for 25 mins total... until I finally rebooted my system.
Here's the log:
I 22:39:09 ImgBurn Version 2.4.2.0 started!
I 22:39:09 Microsoft Windows XP Home Edition (5.1, Build 2600 : Service Pack 3)
I 22:39:09 Total Physical Memory: 3,143,756 KB - Available: 2,576,736 KB
I 22:39:09 Initialising SPTI...
I 22:39:09 Searching for SCSI / ATAPI devices...
I 22:39:09 Found 1 DVD