Any online instructions for replacing the heater core?

I have to replace the heater core in my daughters 98 Durango 4wd... the usual lack of heat, did a backflush w/ minimal success, so I'm just going to replace the durn thing. But I'd like to see a blow-up or diagram with some instructions, or have someone who's done it give me a play-by-play.
Thanks!

autozone offers a version of alldata diy; you can check it out at www.autozone.com (http://www.autozone.com)

Whenever I pull out the dash and HVAC box on a Dodge, Chrysler, or Jeep, I replace both the evaporator and the heater core- The evaporators leak and need changed for the a/c. So, I normally change the heater core while having the HVAC box out. You may want to consider this as well- good luck!

Thanks to theFREAKnasty82 and brcidd. I'll look it up and do the double swap on that system. Experience sure counts, don't it?