PROJ Problem

[Avramov,Daniel [Ontario]]

How do we set up an Environment Variable in IIS 6 for the PROJ_LIB?
 
The reason we are asking is that we are encountering problems with the
projection library not being found.
It is fixed when the the PROJ folder is sitting on the C: drive (Not a
desired solution) 
OR 
It works when we have the CONFIG PROJ_LIB set in the MapFile (We do not
want to have to do this all this time).
 
We are using CWC2 which writes out a default.map file without our
specific CONFIG PROJ_LIB statement/path. 
How would we write to the map file our CONFIG statement using php/php
mapscript?
 
Thanks in advance.
 
Daniel and Debbie.
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