I had the same thing going on w/ mine, K. I had to lower the master output on the RP to get rid of the breakup if I used any presets w/ lots of gain/OD when going thru my V.Jr.
When recording into the computer using Audacity, I usually set each preset by tweaking knobs, but didn't save them, 'cause once the recording was done, I wanted them the way they were used w/ the amp.
You'll find some goood sounds in there. I think doing the setup on-screen w/ the Digitech program will help alot once you get used to it.
Guitars
Wilburn Versatare, '52 FrankenTele(Fender licensed parts), Fender USA Roadhouse Strat, Fender USA Standard B-bender Telecaster, Agile AL 3000 w/ WCR pickups, Ibanez MIJ V300 Acoustic, Squier Precision Bass,
Amps
Ceriatone Overtone Special, Musicman 212 Sixty-Five, Fender Blues Jr., Peavey Classic 30, Fender Super Reverb, Traynor YCV-40 WR Anniversary w/ matching 1x12 ext. cab, Epiphone SoCal 50w head w/ matching 4x12 cab (Lady Luck speakers), Avatar 2x12 semi-open back cab w/ Celestion speakers
Pedals
Digitech Bad Monkey, Digitech Jamman, DVM's ZYS, Goodrich volume pedal