Outboard Equipment With Mbox 2? Options

[alexbutterfield]

I previously posted this question, but possibly in the wrong forum (Pro Tools).

I want to know if it is possible to use outboard equipment--for example, my Roland RE-201 Space Echo tape delay--with an Mbox 2. I'm running Pro Tools LE 7.3.1cs2 on an iMac G5, 1.8 gHz. Can I do it if I add a mixer of some sort (and, if so, how and any suggestions on a reasonably priced, decent quality mixer?)?

Thanks.