Are you required to use a device such as the ds1820?
Perhaps your project involves obtaining a temperature reading from one or more sensors?
Why not consider a simple thermistor.
You can use PBP's "POT" command with as many pin+thermistors as you like.
Very simple do to.
Alternatively, you might try putting an Oscope on the digital output of the ds1820 as it outputs 16 bit words.
You should be able to figure out how to get the pic to interpret those with a little work.
If it were me, I would go for the thermistors.....get to the end goal for much less work. :-]
Good luck on your project!!