Hi, I'm in in the same situation, tried it with SuSE, sort of defaulting my way through the install, putting Grub on the C: drive, and wound up not being able to boot to Windows. Restored the MBR, restored the second drive to the orginal state, tried it again with Mepis, this time putting Grub on the second drive and pointing the Windows boot loader at it. Now Windows boots fine, but Mepis won't.
In other words, I'm not much help, and haven't found much either. Here's a link to the most coherent reference I've found so far regarding the second approach: