I think you meant "ExchangeRecovery" (also listed as "Recovery for
Exchange") from www.officerecovery.com. I've not tried it but I get the
impression that the demo version (free download) gives you an idea of how
much could be recovered, but you need the full version (shed-loads of wonga)
to perform the recovery.

Alternately you could try "OST2PST" (again, I have no experience of this),
http://www.xcopy32.com/details.php?file=24. Not clear whether this is free
or not.

Doing a google, http://www.payam.com.au/ seem to offer this service for a
relatively low cost.

I suspect that ALL of these work the same way, which is to convert the .ost
file to a .pst file which you can then open in outlook.

Hope you manage to recover your emails.