Search, and search hard. It's been covered countless times. If you have searched and haven't found answers, you weren't looking hard enough beacuse there was a post regarding SRS systems active in the last day.
I think the bottom line on the srs is that your springs need arch. I have a soa and a srs and am going from 4" lift springs to stock height springs in the next couple of weeks. I'm a little worried about the arch of stock springs but someone on this bbs said that they had a srs with stock springs and it worked great. Once I get the new springs on I'll put the jeep on a ramp and see if the wheel is still going back when the springs are compressed or not. If they're not I may go back to sua.