It's not that folks are not trying to be encouraging. This is probably one of the more common problems encountered by the do it yourself Jeep owner. I broke one myself and used essentially the same approach as hartleybiker, but only dropped a single bolt through the top and secured it with a nut. Not easy to get a wrench on it to tighten it up, either.
So I agree with Jerry's approach, but since you have never taken these off before, want to add that you need to spray at the top (above the frame) because the bolt goes up and through the welded nut. A week or so of regular dousing should make it a lot easier. PB Blaster is (IMHO) the best thing to use for this.
BTW, I considered myself lucky to only break one. I have heard of people breaking them all. And just because your frame does not show rust does not mean these bolts will not be an issue. If you had to torch off the fronts, I think you are going to have a difficult time with the rear. Don't be discouraged, just be prepared if the bolts break.
Have fun (seriously).
2004 TJ, 4.0, 5-speed, stock height, 31X10.50X15 on 8" aluminum rims, some other nice tweaks to a great vehicle