I agree with Tom on tuning. Mine (it's mrsleveller's actually but she prefers her mandolins) is tuned an octave below the mandolin with the top pair down to D - this is the same interval as my cittern, which is tuned GCGDG.

If you're looking for chords for any instrument in any tuning download Chord Alchemy - it's brilliant for creating chords, looking them up in reverse and creating chord diagrams for putting into score etc. I think it costs around £20 or less and is well worth the money.