Help! With rescued bally

Snagged a friend's camera and picked up a digital gram scale tonight. The little guy refused another f/t peach fuzzy last night (I was trying him in the deli-cup method, my last shot before live feeding) so I gave him a good soak and cleaned his cage (probably the first time it's ever been done, poor thing) and took this opportunity to weigh and photograph him. I changed his set-up from how his original owners had it, for one there was a big fake plant in a coffee can and a huge branch taking up all the room, and for another those things weren't able to be cleaned well, not that I think they ever cleaned his cage in the first place, if the layer of urate powder underneath the aspen I took out is any sign.

He apparently weighs 49g. I tried him in a cup (minus the cup's weight) and out, moved him around, etc and got the same thing. Do you think I should risk stressing him further when he hasn't eaten in roughly a month, and just take him to my vet? I don't have a stool sample yet. Or should I still try a live hopper first, with pre-scenting etc, once it's been a few days since his last feeding attempt? Here's pics of him, sorry they kinda suck but I'm not good at using this camera.
http://i7.photobucket.com/albums/y28...hhhhhhh022.jpg
With my hand, for comparison.
http://i7.photobucket.com/albums/y28...hhhhhhh019.jpg his cage, now that I made it more humidity-friendly and with less unsterilisable crap in it--
http://s7.photobucket.com/albums/y28...hhhhhhh025.jpg
He's pretty thin and flabby, and seems to dehydrate rather easily
http://s7.photobucket.com/albums/y28...hhhhhhh030.jpg
His rear seems...fat. Could this be a problem? I've soaked him, but no poop, and that area doesn't feel squishy or anything...
http://s7.photobucket.com/albums/y28...hhhhhhh020.jpg
Poor skinny Edgey-poop :C
http://i7.photobucket.com/albums/y28...hhhhhhh032.jpg

I want so badly for him to make it. I had no idea he was in such bad shape when someone pointed him out to me in the paper, I just wanted to get into keeping pythons and thought I'd rather rescue an unwanted one than order from a breeder. If I'd known he was unhealthy I would still have adopted rather than bought, but this makes me feel overwhelmed as a new BP owner, even though I am used to keeping other snakes.

So, based on pics and his weight, should I just vet him early tomorrow when they open or do I have time to wait and try some more stuff before stressing him with the vet? I want to do whatever will make him healthy the fastest, so he can come out and be my buddy :cool:

Wow... looks an awful lot like my little rescue guy. Who also hadn't eaten in a month or more, is supposed to be 3 months old and weighs 44g, and also 'wrinkles' up easily due to bad prior dehydration.
When they are dehydrated badly for a long time, like mine was, they can build up very hard urate stones that can clog the works and swell their tail ends like that. I took mine to a vet and the stuff was squeezed out, so I would recommend you take yours in as well. Just make sure the box you take him in is nicely padded and warm but not too dry and he should be ok.

Just a few things as recommendations for his home:
What size tank is that?? If it's bigger than a 10 gallon, store it away and get him in a 10 gallon or equivalent size tub. Especially since he's got so many issues.
Make sure to cover the back and sides with background at least if not insulation. He needs all the security and stable temps he can get.

Ok, that's my say on the subject. He's a pretty little guy, so hopefully he'll pull through in your care. :)

He's in the 10g he came in. I can put up some background though. I want to move him in a tub once I've gotten him eating, but I'm afraid to do to much that might stress him...

I wasn't sure whether to wait and try to feed him live once, or just take him in to the vet ASAP. I'll call my vet now and see if they're open today or tomorrow.