Aux Out RCA jacks straight to the computer. I have a 1/4" aux in on my PC, so I go from the RCA jacks to a trs 1/4" jack. Then on XP, set the windows mixer to 'line in', instead of 'microphone'.
That's what I do.
BTW, the outs are not RCA:
MAIN OUT – Use 1/4" TS cables to connect these outputs to an
amplifier or speaker system. The volume of these outputs is
controlled by the MAIN VOL knob on the top panel.
AUX OUT – Use a 1/4" TS cables to connect these outputs to a monitor system or recording device.
The AUX OUT signal can be set to be identical to or independent of the MAIN OUT signal.
Otherwise the info is correct, I do the same.
Don't use the headphone jack for recording - ever!
Typically AUX is for monitors, MAIN is for PA / Recording.