Welcome porkchop, here's the long answer-
The Rolls has three output choices (the two XLRs, the 1/4" headphone/aux jack, or the 1/8" headphone/aux jack) each can work for what you want to do. The Edirol has two mono inputs- one left, one right. You'll need to use both of them .
You just need the correct cables to connect the two machines. First the part you have probably figured out already- Start by plugging the two mics into two of the mic inputs on the Rolls. Plug the left mic into input 1 and pan it hard left, plug the right mic into inpu 2 and pan it hard right. Turn the gain on the the unused 3rd input all the way down. Pan on that one doesn't matter. Make sure phantom power is switched on for both inputs you are using. So far so good..
From the Rolls to the recorder you have multiple output choices that will work, each uses different cables or adaptors. Take your pick-
Choice 1) Using the XLR outputs from the Rolls requires two cables. Each needs an XLR female connector on the Rolls end and a male 1/4" TS (Tip,Ring) plug on the recorder end. The XLR end is 'balanced' with three contacts (numbered 1,2,3) and the 1/4"TS end is unbalanced with two contacts (Tip,Sleeve). You'll need the cable wired correctly to the contacts in the connectors to accommodate that. Wire it like this diagram:

Or buy two of these:
http://www.bhphotovideo.com/c/search?ci=4202&N=4289288130+4289361271+4289360799Choice 2) Using the 1/4" Aux/Headphone output from the Rolls requires a 'Y' cable with a 1/4" stereo TRS (tip,ring,sleeve) connector on the Rolls end and two 1/4" TS jacks on the recorder ends. Wire the three sleeves together, the Tip of the TRS to the Tip of the left TS plug and the Ring of the TRS to the Tip of the right TS plug. Or buy one of these:
http://www.bhphotovideo.com/c/product/160653-REG/Hosa_Technology_STP_201_Stereo_1_4_Male_to.htmlChoice 3 is the same as choice 2 but substitutes the 1/8" TRS headphone/aux output jack on the Rolls. It's wired exaclty the same, only from a 1/8" TRS male instead of the 1/4". Or buy this:
http://www.bhphotovideo.com/c/product/160639-REG/Hosa_Technology_CMP_153_Stereo_Mini_Male_to.htmlChoice 2 is better than 3 since the 1/4" jack is more substantial and less prone to damage or a connection problem when cable tugging happens, but if you have a common 'IPOD to stereo RCA' 'Y' cable laying around all you need are two RCA male to 1/4" TR male adaptors available at any Radio Shack and you're good to go. In otherwords if you have something like this:
http://www.bhphotovideo.com/c/product/488015-REG/Hosa_Technology_CMR_203R_Stereo_Mini_Angled_Male.html You just need two of these on the RCA ends:
http://www.bhphotovideo.com/c/product/134167-REG/Comprehensive_SPP_PJ_SPP_PJ_Male_Phone_to.htmlNow plug the left 1/4" Male TS jack into input 1 on the Edirol and the Right one into input 2. Pan input one hard left, pan input 2 hard right. Set the recorder to record a stereo file. You can control the gain in two places in your recording chain- at the Rolls and also at the Edirol. Each can compensate for the other somewhat. Shoot for somewhere around the middle range of both to be safe, not all the way down or all the way up on either one. Dial in your levels so that the loudest sounds reach most of the way, but not all of the way to the top of the level meters on the recorder.
Begin recording in glorious stereo!