Yes but be careful now that it's summertime. The lower the tire pressure the faster the carcass will heat up and the more likely you are for a tire to separate. Personally, I'd deflate the tires, break the bead and put like 10 oz of BB's in each tire. The BB's will work as a balancer and you'll be able to run the proper PSI on the road till you can get some new rubber.
2005 Rubicon :
4.0 Automatic,4.11 gears,4:1 Transfer Case
Teraflex 3" Coils,Rancho 9000x's,35" KM2's,(fenders...what fenders?), Cobra CB, Lowrance Baja 480c GPS,2"Wheel Spacers, Big Daddy Tie Rod,Superior Evolution Shafts.