Thanks for the links, it's has given me some more insight into what i'm trying to acheive.
I'm actually using a pic16f684 and have connected the "DQ" pins of the temp sensors to their own pins on the pic chip (pins 6 & 7) so i don't think i need to identify them via a 1 cable network?
Could i just use something like;

trisc.4 = 1
trisc.3=1
cell1 VAR PortC.4 ' One-wire data pin "cell1" on PortC.4
cell2 VAR PortC.3 ' One-wire data pin "cell2" on PortC.3
solenoid VAR PORTC.1 'solenoid contactor coil power

Cold_Bit VAR R_Temp.Bit11' Sign-Bit for +/- Temp. 1 = Below 0 deg C
Real_Cold CON 1 ' Define Real_Cold = 1
R_Temp VAR WORD ' RAW Temperature readings
TempCell1c VAR WORD ' Temp in deg C
TempCell2c VAR WORD ' Temp in deg C

start:
GOSUB Temp_1
GOSUB Temp_2
let tempcell1c = tempcell1c + 21
if tempcell1c > tempcell2c then
high solenoid
else
low solenoid
end if
let tempcell1c = tempcell1c - 21
pause 45000
goto start


Temp_1:
OWOUT cell1, 1, [$55,$28,$B1,$FE,$22,$00,$00,$00,$5D,$44]
OWIN cell1, 4, [Stat]' Check for still busy converting
IF Stat = 0 THEN W1' Still busy?, then loop
OWOUT cell1, 1,[$55,$28,$B1,$FE,$22,$00,$00,$00,$5D,$BE]
OWIN cell1, 2, [Temp.LOWBYTE,Temp.HIGHBYTE]' Read two bytes, then end communications
GOSUB Convert_Temp1

Convert_Temp1: ' +32.0 to +257 F
IF Cold_Bit = Real_Cold THEN Yikes ' If Cold_Bit = 1, it's below "0" deg C
Sign = "+"
Dummy = 625 * R_Temp ' Multiply to load internal registers with 32-bit value
Tempcell1c = DIV32 10 ' Use Div32 value to calculate precise deg C
Dummy = 1125 * R_Temp
ENDIF
RETURN
Temp_2:
OWOUT cell2, 1, [$55,$28,$B1,$FE,$22,$00,$00,$00,$5D,$44]
OWIN cell2, 4, [Stat]' Check for still busy converting
IF Stat = 0 THEN W1' Still busy?, then loop
OWOUT cell2, 1,[$55,$28,$B1,$FE,$22,$00,$00,$00,$5D,$BE]
OWIN cell2, 2, [Temp.LOWBYTE,Temp.HIGHBYTE]' Read two bytes, then end communications
GOSUB Convert_Temp2

Convert_Temp2: ' +32.0 to +257 F
IF Cold_Bit = Real_Cold THEN Yikes ' If Cold_Bit = 1, it's below "0" deg C
Sign = "+"
Dummy = 625 * R_Temp ' Multiply to load internal registers with 32-bit value
Tempcell2c = DIV32 10 ' Use Div32 value to calculate precise deg C
Dummy = 1125 * R_Temp
ENDIF
RETURN




Yikes: ' Display full range -C to -F conversion
Sign = "-" ' Display - symbol for negative temp
Dummy = 625 * ~R_Temp+1' Multiply to load internal registers with 32-bit value
Tempcell1c = DIV32 10 ' Use Div32 value to calculate precise deg C
Tempcell2c = DIV32 10 ' Use Div32 value to calculate precise deg C
ENDIF
RETURN