I'll give you the background info first:

So a little over a week ago, I totally ****ed up my lower back. While doing squats (I decided to switch from low bar to high bar that day), I accidentally leaned a little bit too far forward, and all 245 lbs of the bar bent me forward all the way until the barbell hit the safety bars. Needless to say, I ended up landing very awkwardly. I was able to stand up on my own, but bending over to take off the plates was impossible. Since it happened, I've been to three doctor's appointments, one of which was a spinal specialist, and got put on Soma muscle relaxers and Naproxen for pain (which doesn't really do anything), and a back brace for extra support. They didn't want to rush into MRI's at the time because there'd be no need if the pain went away a week later, but it's pretty much remained constant--hurts when I sit or stand for more than 5 minutes, can't bend forward far without support, hurts to raise legs etc. I'm thinking it might be a bulging or ruptured disc, so I'm going back to the doctors tomorrow to explore that as a possibility and hopefully be put on a pain killer that actually, you know, kills the pain.

Anyways, as you might expect, I HATE not being able to go to the gym. I've been following the StrongLifts 5x5 program the past couple months and have been making some steady progress. Since the injury, I've been keeping my diet mostly in check and making sure to get in adequate amounts of protein, but I don't want to lose the progress I've made so far. I know that any kind of compound movement is going to be out of the question for a while, but my question is, would doing some light to moderate isolation exercises a couple times a week be advisable? Obviously nothing involving the lower back, and most likely just machines. If so, what would you recommend as far as the exercises themselves and how you'd split them up?