Did you replace the starter because of a no start condition? In other words did the old starter work from time to time or did it stop starting and you replaced the starter thinking that was the problem?
I would check
- starter itself (Try jumping/hotwiring the starter... if it starts... its not the starter)
- battery cables (do the dash lights dim right down when you turn the key.. if so ... you may have a battery problem)
- neutral safety switch (sometimes you can fudge this by pushing slightly on the gear lever while you try to start... if that works... you have bad switch)
- key switch (I have a 95 with a bad switch... if you jiggle the colum wires around it will start at times)
I know what you mean about being fumed at the jeep... at least once in a project I swear I'm going to push mine into the alley and burn it. Keep patient and work your way through things logically and you'll get it figured out.