Ubuntu Macbook air 3,2 Install issues

[Darius_Russell]

I recently went through the guide to installing natty narwhal on my macbook air 3,2. I knew the graphical errors would happen, and that I would need to install the drivers. The issue is, the additional drivers app is crashing on me. I'm really screwed over here, I messed up bad, and installed ubuntu over OSX, so I have no other OS to boot to. I cant read anything, and I have no clue how to fix the issue. I know I can get the drivers working in 12.04, or even Arch. The issue is, a GRUB screen doesnt come up, and I cant read anything well enough to figure out how to boot from another drive.
If anyone could please point me towards help I would greatly appreciate it. I'm a student and every day I cant work, really screws me over.
Thanks
Darius

[zircon_34]

do you still have the recovery partition? if yes, reboot with command+R, and repair or reinstall OSX. If not can you still boot with your USB disk into Ubuntu?