The Computer recognized the Console as a GENERIC AUDIO DEVICE, and thats good as your USB connection is good, BUT your only going to get TWO TRACK out of that USB port, Not 12-16-32 tracks recording, If you want to do Multi track you need another type of Interface with as many INPUTS as you want to record, These are expensive and it gets very complicated, I suggest you seek out a local college and enroll in a recording program there. I dont care how EASY they say this is to do, ITS NOT.
Now you have the Ability to record directly to your Del computers HD from the USB port on the Mixer, LEARN HERE, It takes time to learn the ins/outs of the Software, Go to PLSN BOOKSHELF and look for RECORDING BOOKS to buy that can teach YOUR brand of software. Be prepared to spend 30-50 hours learning the way this works. I KNOW Ive done it, There are no shortcuts, No magic way to make it work, You must spend the time and learn the software.
Now a few tips, Record to WAV Files if you can, at CD Quality, You dont need to use any highher BIT RATES etc.
Depending on how big of a Hard Drive you have you could have HOURS of recording time, or signifigantly less. The Best Type of HD to use for recording is a 7200 RPM as it allows faster Transfer with less latency. I actually suggest you use an EXTERNAL HD of about 500 GIG, made by LACIE or others, USB is fine be sure its the latest 2.0 USB.
Right now your going to be bale to do Two Track, Left and Right from your existing setup and you can do some excellent recordings this way, The only Issue is BOARD recordings while playing out live wont be balanced correctly as the LOWEST volume Instruments will be loud in the mix, and the LOUDEST will be low, due to your amplifying the instruments with less acoustic output MORE....
Find the Books and read up, Peavey doesnt give lots of help on this isse, I learned by doing and spending money, Welcome to the recording world.