Boot question

[jeeky]

I've been wondering for some time now about this: How do I boot my OSX86 Image off of a usb drive? Let's say I don't have a CD drive or any more blank DVD's and I really don't feel like going to the store and getting some (yes, I know someone will say 'stop being lazy', but seriously, some may want to know). I have tried searching for this, but I apparently cannot get the correct results (maybe incorrect keywords... heh )

 

But yeah, this is what I'd like:

I have a 100GB usb hard drive. I'd like to make a specific partition, about 4.7GB, and place my ISO image (I'm guessing I'd have to make it so the contents are out of the iso, bare files, like a CD) into the partition. But how do I make that partition a sutible environment to be recognized by my BIOS (assuming I can boot from a usb drive)?

 

Hopefully what I said makes sense. I'd like to know, or if someone can point me in the correct direction, that'd be appreciated.