I have a braeburn 1200 the set up is
red = r
orange = o
blue = c
yellow = y
green = g
white = w2 and is jumped to e

the new thermostat is a honeywell rth7000 it has
c
g
y
o/b
rc
r
aux
e
l
The instructions do not help

See page 10. The instructions are very clear. The instructions are exactly the way I would hook it up if I was there. Do letter for letter and READ the set up instructions.

http://customer.honeywell.com/techlit/pdf/PackedLit/69-2104ES.pdf