I have long wanted to edit Dimension Pro sounds. I have tried a few times, but can't seem to make it work.
 
Can anyone give me a short lesson on editing the ADSR, etc. so that I can change the sound and save it as a pre-set?
 
Thanks!

Are you talking SFZ or the envelopes in DimPro itself?

 
First of all, you have to know what an envelope is (what I think you're calling a waveform) and what it does.
 
If you're really new to sound creation, take a look at the free references in this post and prepare yourself for a lot of studying.
 
If you are already experienced and just want to know how to do it in DimPro, the help file under
 
    "Using the Modulators Module -> Envelope Generators"
 
explains how to edit the EGs.
 

Also worth checking out the Dimension Pro wiki!
 
http://dimension.technetos.com/tutorial/
 
 
Dimension is a breeze once you know your way around.  The traditional amplitude ADSR can be found under the Amp Modulator tab:
 

 
 
Then make sure the Amp Envelope is ON:
 

 
 
You can then right click within the Envelope area to make new Envelope 'Nodes'.  Create any custom ADSR shape you want. 
 
Also worth noting hotkeys:
 
S - Turns node into a Sustain Node (Vertical orange line appears on node)
N - Toggles Envelope Segment shape (Used in the screenshot for the release segment)
 
 
Save your new program or edited ADSR program as a new Program within the File I/O menu.
 
Enjoy!