I'm pretty sure the 2000 4.7s were the only year Mike Leach could flash. You might want to check with him, but I don't have his contact information. Also, I heard some rumor that Dodge was upset that Leach was reflashing and stop him from reflashing PCMs. But this is something I sort of remember reading, so he could still be reflashing. Oh, Sam should have Mike's number since he reflashed Sam's PCM.
You should also contact Hypertech and ask if they plan to release a 4.7 programmer. The programmer would be sweet since it'll let you recalibrate your PCM back to stock or closer to stock figures. This might come in handy when you get your supercharger, because a tradition flash with too much advance might cause some serious detonation issues. Hope this helps.