web.config modification for medium trust enviroment for asp.net 2 . windows server

WE have a site which was working fine . it was developed in asp.net . before server was configured for high trust enviornment but now they have changed to medium trust . so we need to make changes in [login to view URL] for site to run in medium trust enviorment. send me how you are going to do it and i will select you . you need to do it with in 20 min. as its not more then that much time. thank you