Hey.  Thanks for all the responses!  I'm not that great with electronics, so I don't quite understand HOW to do everything you all said yet.  I'll do some more research and give it a shot though.  I can afford to mess this up even though that's not my goal!  I might post back here again with some pictures if I get stuck.

Hey.  I'm going to be trying a pro sound mod (3.5 mm jack) for the first time on a DMG this weekend using one of the many tutorials I'm finding on Google.  I've been looking them over and am starting to get confused on a few things now since they all go about the mod a little bit differently.

1: Is it possible to use headphones through the new pro sound jack I'm installing, or it only for recording and/or powered output?  I'm seeing some people say that the new jack doesn't work for headphones and instead will just sound really low.
2: Does the volume control of the DMG work for the pro sound jack I'm installing, or is it only tied to the original headphone port?  Can I make it work for both?
3: I want to be able to still use the original headphone port as well as the speaker, so I'm guessing i just don't disconnect those when I'm doing the mod, correct?
4: Is there a way to have the speaker shut off while I'm using the pro sound jack?  Everyone seems to say that it stays on, but I don't want to permanently disconnect it

Thanks for any help!