Mounting is a great technique and I would highly recommend to anyone who's adventurous enough to give it a try! However, I'm not sure if I could do it... LOL...
If you're leary of doing this, try putting it in water for a few days to weeks to rehydrate the roots thorougly (and it often helps instigate new root growth), then repot in another medium other than the sphagnum it came in. Take your pick, but have fun! Remember, orchid growing should be a fun hobby, not a chore