Vista - WMDC - Where does it locate sync files in Vista?

I'm running Vista Ultimate and have recently had to blow away my PDA.

Prior to this I synchronised the device via WMDC in the vain hope that after I completed this I could resync and be back to square one with all my contacts, calendar entries, etc in place.

OK, I got back my note files but failed to recover my contacts and calendar entries on the resync.

Any suggestions as to how I can recover from this? I thought there might be a location on the C: drive where WMDC might locate sync files and from where I could just transfer them back manually to the PDA. Anyone know if this is possible and where the sync files would reside?

In desperation...