Here's a good link on the SBS forum for Hare's Mask but you need a Dubbing Rake for this (or something similar)..
http://www.flyforums.co.uk/fly-tying...ares-mask.html
(also check the index pinned at the top of that forum, there's some great stuff on there)
I actually take hair for dubbing off a skin by making a short clip of the fibres right down at the roots and then teasing it out with my fingers and thumb. You do want the fibres to have some length so that they will curl around your thread if using a direct dub technique or sit in the thread if using a spinner etc.
You might need to experiment with this a little to make sure that you get the right texture and colour of course but it's not too difficult with a little practice. Note, you only need to crop out a little at a time if using something like Hare or Musk Rat.
For your purposes I would just try the Olive Rabbit's fur on it's own first of all to check out the results.
If you wanted to use the wool at some point to mix with some sparkle or something then you can also rake out fibres with your finger nails to do this.