I am trying to install a honeywell thermostat model # rth230b, I have 5 wires from my old unit... labeled r,g,y1,w1,w2. I don't know how to wire up the w1-w2. Do I put them both on the w peg, or what ? Please help.

If you have 2 stage heat the thermostat will not work. A heat pump is 2 stage. So if you have a heat pump the thermostat will not work.

Read this.

http://customer.honeywell.com/techlit/pdf/69-0000s/69-1800.pdf

It will not work. See read this above.