Really, if you're new to cars & trucks, you probabaly do not want to change the heads yourself. I'd find a good local mechanic, not a big name shop. You could get quotes, and compare them against your Hubby's shop.
Do you have a picture of where he applied the goop? I'm guessing he tried to plug up the head with RTV sealant. Not the best as an external application and high pressure.
Susie, please take pictures. Then, upload them to an image site (like flickr, photobucket, Google albums, megaupload, etc). If you don't know how, let us know. We can help.
Take a picture of your spark plugs and the gooped area in question.
Not completely necessary, but we could probably diagnose your spark plugs better and get a better idea where the head is leaking.