I know it is the other side of the world but Denver botanic gardens has been promoting desert planting for for a number of years. It probably deals with similar conditions. They would be your best bet for information about high desert planting. Panyoti sometimes comes on the forum he could probably point you in the right direction for finding advice for your project.
Also Rokpa, a Tibetan charity sends students to Edinburgh botanics to study setting up a nursery in Tibet for native medicinal plants, maybe if you contact their team you could find out about some of their solutions to problems.
Susan