No. Not unless you know how to rewrite all the needed device drivers, firmware and BIOS calls involved with your particular DVD drive model.
Nope. Just someone who knows what's what and has been dealing with computer for the past 15 years. Gamecube discs are written in a dual-encryption format. First they're encrypted, then they're written to the disc from the outside, in. You'd have to write the firmware for your DVD drive to look at the outer edge of the mini-DVD format discs for the first bit, then have it blind-read inward to do a direct rip. Then you'd have to process it through a utility that can decrypt, such as FSTFIX or some such, to manage it as a "proper" image format. But, since you want to have your DVD drive directly read the GC discs for the purpose of emulation, you'd have to recode the emulator you want to use, so it can access your DVD drive directly, with the modified firmware and hope it doesn't have any sort of trigger in there to flip it out. Good luck, though. If you can hack together such a job, make sure to post it on the net somewhere and link to it. It'd be a big deal for the GC emulation scene, and may well revive it.