[ubuntu] 12.10 Live USB won't boot

I'm having a problem getting 12.10 amd64 Live CD installed on a USB drive to boot on my laptop.
The startup process freezes after:

[ 9.728143] [TTM] Zone kernel: Available graphics memory: 8162500 kiB
[ 9.728176] [TTM] Zone dma32: Available graphics memory: 2097152 kiB
[ 9.728212] [TTM] Initializing pool allocator
[ 9.728257] [TTM] Initializing DMA pool allocator
[ 9.728293] [drm] nouveau 0000:01:00.0: Detected -344145920MiB VRAM (GDDR5)
[ 9.728328] mtrr: type mismatch for e0000000, 10000000 old: write-back new: write-combining
[ 9.728379] [drm] nouveau 0000:01:00.0: 512 MiB GART (aperture)

I've tried booting with nomodeset, and this eventually ends in a black screen.
I've verified the ISO image before using Universal-USB-Installer to put it on a USB flash drive.

Laptop specs:
Intel Core-i7 3630QM
16GB DDR3-1600
NVIDIA GTX 675M (Optimus)
250GB Samsung 840 SSD (SATA-3)
120GB Intel 525 mSATA SSD (SATA-3)
1TB Hard drive
Intel Centrino Advanced-N 6235

How can I solve this issue?