First off, are you talking about the 1010 or the 1010LT?
The 1010 has 1/4" balanced inputs, not rcas.
You need a multitrack capable recording program like Cakewalk or Cubase. You would arm the eight tracks you want to record on, and on each track specify the input source (Delta In 1 left, Delta In 1 right etc.)
If you're talking about the 1010LT, it has 2 preamps. You can plug a pair of dynamic mics onto those, and record directly onto the first 2 tracks. The other 6 inputs will require preamps or a mixer. Best way is to plug the mics into a mixer, and output from the channel inserts or direct outs into the 6 soundcard inputs