Not sure about MiniDiscs, never used them! But I use a program called CDEx to rip my CDs into MP3 format, and then burn them back onto a single CDR - hence I getting approx 8 CD Albums to One CD.
There was also another program call All-to-MP3-Converter which I found really useful, and would allow you to just convert the files, so you'd rip them as normal from CD, and then convert them.
Not sure if this answers you question or not! Soz!