1.Can I use any of the alesis expansion cards, such as the Qcards on my nanosynth?
2. How do I get to the mixes and drum loops listed as coming with the extra sound banks on the CD???

If you feel you're getting ignored, try this address for the Quadrasynth Pages.

www.midiworld.com/quadrasynth/

Seems like an active list.

Q cards do not work with the NanoSynth, only with the Q series instruments.
The samples on the CD not of much use with the Nanosynth either.
They are found by exploring the directory tree on the CD