Joined: 25 Dec 2008
Neither of the Feeble Files versions are possible. It'd require disc swapping, and that isn't possible without adding extra, port specific, code to the Dreamcast branch. I don't think anyone's willing to do this. It would require way more time it's worth, for no recognition or monetary compensation.
For some of the other ScummVM games that are at, or just beyond, the threshold of standard cd-rs size, you could try 99min/900mb cd-rs.
They aren't produced in the US, so you'll have to order them online. I've had mixed results with the self-booting, but they should all work with a boot-disc.