OK, you need to plug your preamp outputs into the Cow inputs.
Then use inputs 17 & 18 in PTLE.
That's the AD
Now for the DA.... because the Cow doesn't have an output level control, you'll have to run from the Cow's analogue outputs into a small mixer, and from there to your amp/speakers.
If you use any of the 001 box's ins or outs, you are not taking advantage of the new converters. all signal must pass through the Cow.
All that said... i'm with Teacher. I'd doubt you'll be getting a big improvement. I have
a Mindprint DI-port, and while there is an improvement ofer the001 converters, it's very slight.
So to do the above test, get a CD player and record a track first going into the Cow, and then going direct into the 001.
Then listen to both track (one at a time) and see if you can pick the difference. Then listen to the tracks first through the Cow, and then throughthe 001 main outs to see if you can pick a difference in the DA.
Good luck.