Its actually quite easy to do, but to hard for me to teach.
I have made custom discs, but have only done it a few times. There are a few programs that are needed, other than Pinnacle Studio.
Anyhow,
What you may want to do is get a DTS demo disc. I suggest #9. (I have about 10 Demo discs, DTS #9 is the best IMO)
There are a lot of people here, that have this disc. And they will all say it clearly shows off a good system.