in that long sticky there is a list of what you need to do with that bundle of cables that was on the shifter.
The car will run without the tune, just not very well. the RPM's will seem like they want to stay up and the speedo will be about halfway what it should be, so it would be worth it to find a tuner. Most shouldn't charge what they would with a full tune. I just dropped off my PCM at my tuner's shop and he swapped it over.
HEADS | CAM | FULL BOLT-ONS | MORRIS BUILT T56 | MONSTER CLUTCH | TICK MASTER | UMI SUSPENSION | BALLER STEREO
2004 Jeep Wrangler Rubicon M5-4" Pro Comp Lift, 33" BFG M/T KM2's. Eagle Alloys, OG Softtop