Linux based (LTSP) Thin Client.

We are a RH 9 Thin Client User (LTSP), In our Network of 100 desktop 80 are Thin Client on linux using just Open Office Internet and Linux based Mail Server, other 20 are MS users, MS users use Autocad and MS. I want to know if there is any tool which will allow the Thin Client users to view the Autocad and MS Project files sent by MS users to the Linux thin client users by mail attachment with clarity.

Thnks and Regards
Vinod