Yes. If you have boot.img, system.img and userdata.img, you just do this:

Commenting post 94: Yes. If you have boot.img, system.img and userdata.img, you just do this:

fastboot flash boot boot.imgfastboot flash system system.imgfastboot flash userdata userdata.img

and you r system is restored. But I strongly advise you to install the clockworkmod first, because if you begin to play a lot, you will need to this often, and with different versions (for example if you have 1.1 originally, then a 2.0 that works, then a 2.1 that fails, you will want to restore 2.0, not the original 1.1)

Also, usually the boot partition doesn't change often, so you might be able to restore a failed system with just system and userdata.