I have an exchange mail server with edb files, OS is 2003 MS Exchange server, the HP recovery utilities were allowed to run on it!

After doing data recovery on it. The.edb is reading zero size with the .log files recovered and.stm files reading significant sizes.

How can i convert the .stm into .edb.or.pst?
Where can I find the contents of the .edb, how do i recover it?

Can .log or.stm files help in recoveing back the .pst.or.edb files?

Your help would be greatly appreciated.
Thanks