Commerce Portal Setup Question

I'm a developer at a private company and haven't had formal training with commerce portal, but we have an existing one set up that works. I have been trying to set up a testing box for development and I can't seem to get the data to synchronize to sql. What application actually reads the synch information from the microsoft message queue and actually creates/updates the proper tables in MSSQL? My synch data makes it into the message queue and just sits there, and since (as I said) I haven't had any formal training in installing a commerce portal setup, I'm kind of in the dark here