I downloaded Riivolution and looked through the readme.txt to find this:
View attachment 39774
I think we have our answer with this alone. I've never messed with this software before, so I didn't realize it relied on original discs. Every portable that I've seen forgoes the disc drive for the sake of battery life. With that said, I believe a workaround may exist in the form of patched ISOs for games. If you're able to patch an ISO of SMG 1 and 2 each time you want to test or play a mod on your console, that's very likely to work.