Hi
Sorry for the delay in responding to your question, I am currently on holidays in Vietnam, and not able to always get access to the internet.
I would suggets downloading and running the Exchange Server Disaster Recovery Analyzer tool against your server. This tool will analyze your information store/s and log files and recomend the best way to recover your database files.
The Exchange Server Disaster Recovery Analyzer Tool (ExDRA) can be downloaded from here
Ben Hoffman
Microsoft MVP - Windows Server System Exchange