From MSSQL to Postgres

I've got a real serious problem that isn't working out well. I'm trying
to migrate a web based appliation from WINNT/MSSQL(6.5)/IIS to the real
world (Linux/PostreSQL/Apache).
The sticky bit is getting the data from the SQL Server data format
(yes data format) to a PostgreSQLable format. The tricky parts are:

I have the data files on tape
They deleted WINNT and installed WIN2000 on the old system
They were never given the SQL Server CDROM
We don't have a copy of SQL Server 6.5 (though there is a
demo copy of SQL Server 7.0 floating around here.)

I'm looking for solutions! Are there any tricks to get from the data
files to a PostgreSQL usable format.
I can do perl so if I had the format I possibly slice and dice them up.

I'm still searching but hope from the number of messages about getting
from there (M$) to here (PostreSQL) there might be an expert floating out
and about.

BTW, This is for a non-profit so going out and buying a copy of SQL
Server for the one time use isn't viable.

TIA,
Rod
--
Roderick A. Anderson
raanders(at)altoplanos(dot)net Altoplanos Information Systems, Inc.
Voice: 208.765.6149 212 S. 11th Street, Suite 5
FAX: 208.664.5299 Coeur d'Alene, ID 83814