batchdpg, if you need help with anything about dpgs, go to gbatmw.net

http://gbatmw.net/index.php?topic=2992.0
here is Dragonball GT you can download, already converted

 

Badabump

 

Eugh Real media stuff, normally I would say something along the lines of get a decent copy (I know for a fact they exist) but if you want to go this route install Real Alternative (there is a quicktime one too if anyone was wondering) and convert with the link bobrules gave you: http://www.free-codecs.com/download/Real_Alternative.htm
You may also see a real alternative lite, this is the same as the original but not bundled with Media Player Classic. I suggest using this if your copy of media plater classic came with one of your codecs/codec packs.

I doubt you have a DRM laced file which is good as I have no idea how to remove the encryption, I vaugely recall something about it though.

 

SUPER: http://www.erightsoft.com/SUPER.html
It's site is a pain in the BALLS to navigate and you can't direct link (because it requires 2 referrers from the site I believe.)