Anyone have instructions on how to change and if it's worth it to try and do it on my own. I'm no Mechanical genius.

Thanks!

EDIT:
And exactly what muffler would be needed...

It is easy I just did mine on a 2001 rodeo sport,try www.isuzuparts.com (http://www.isuzuparts.com) for OEM I could not find after market.
Spray flange bolts well in advance with liquid wrench or Kroil to make removal easier,the old bolts can be tough,I normally change the tailpipe if it is as rusted as the muffler it makes for an easier and better job,don't forget to order gaskets,they are not common,but the link above stocks them.
Also look at the rubber hagers for damage,good luck.SF

Anyone have instructions on how to change and if it's worth it to try and do it on my own. I'm no Mechanical genius.

Thanks!

EDIT:
And exactly what muffler would be needed...


Did you try this site on Ebay. http://stores.ebay.com/Mac-Auto-Parts-and-Accessories

It is a lot cheaper that the OEM one.