I'm replacing my thermostat the old one has 2 wires without letters, the new is RTH6300B, honeywell, how do I install it?

Thanks in advance,
I am switching from a TOTALINE P474-0100 to a Hunter programmable 44360.
A/C & gas heat 5 wire system wired on the totaline as such:
R - red
G - green
Y1 - yellow
W2 -
B O W1 - white
Y2 -
C - Brown


The new hunter has which I have wired
G - green
Rc
Rh -red
Y/O - brown
W/B - white
Y1 - yellow

Currently I can't get anything to turn on!