Dynamic Start Folder

Sorry for my english.
How can i do to have Dynamic start folder, for example as parameter into command line? Is important for me don't have wrote in config.asp.

Thanks

KK

add ?d=directorypath to the calling default.asp
then use request("d") to retrieve the parameter

replace this line :
Const wexRoot = "c:\"

by this :
dim wexRoot
if (request("drive") = "") then
    wexRoot = session("wexroot")
else
    wexRoot = request("drive") & ":\"
    session("wexroot") = wexroot
end if