I found this today. Others might find it helpful also.. Works with windows or your PDA.
http://www.giwiganz.com/Projects/2005/desplan/
Ivan................
Nice little descent calc' program
Moderators: Guru's, The Ministry
Nice little descent calc' program
If you're REALLY mad at a fella, walk a mile in his shoes. This way, your a mile away from him and you have his shoes!!