Fanman:

I can't help you with the POT and or RCTIME command, but I can help you recover the internal oscillator calibration value.

The attached file OSC-CAL.bas is a small PBP program to load into your 12F629 and or 12F675.

The attached file OSC-CAL.doc is a word doc showing how to recover your OSCAL value.

Hope this helps,
Ron