Will25,
I posted in your other thread but didn't read this one before I did. You need to find an adapter that will convert from RCA to 1/4" and buy two of them. They should be cheap - under $5 a pop - and likely a local music store will have them if they carry Hosa-branded stuff. They're usually kind of unreliable, but will be fine for several uses and you can see if you like the results.
They look like this:
http://www.national-tech.com/hires/30s1-15300.jpg
Anyway, the adapters should have a 1/4" female and RCA male setup. You need to plug a 1/4" cable into each adapter, plug the RCA end of each adapter into one of the RCA (red or white) outputs in the 488, and then plug the other end of the 1/4" cable into the 1/4" jacks on the 0204. I have attached a picture indicating where these jacks are (one is by itself in channel 2, the other is in the center of the Neutrik combo jack in channel 1).
So: 488 --> adapter plug (RCA) --> 1/4" cable --> 0204
Then in your DAW, set two tracks up so that one takes from channel 1 of your 0204 and the other takes from channel 2 of the 0204. Keep your volumes
set the same for both inputs.
Then record in the DAW with 488 playback, and pan the tracks you recorded all the way left and right in your DAW. It doesn't matter if your cables go into the wrong inputs and your L/R channels get reversed on playback because you can switch them around again by panning in the DAW.
Finally, keep your levels reasonable. You want to push them a little because you're coming from tape, but DON'T LET THEM CLIP. You can always turn things up later in the DAW.
Good luck!
Just a note: If you want to use RCA cables instead of 1/4" cables, you can set up the adapters at the other end. Then you'd be looking at:
488 --> stereo RCA cable --> adapter (one on each cable in the stereo pair) --> 0204
Those would look like this:
http://ak.buy.com/PI/0/350/218260552.jpg