Thanks Brian,

I'm not sure quite what to say though. I'm sure the tip I need is in the reply, but most of the answer went over my head.
I've not used shiftin/shiftout of anything in PBP so I'd rather get the i2c commands to work for me (if it's possible).
The sensor is 20mm from the PIC, so I'm hoping distance related issues should not be a problem. I'll just have a quiet little play with the i2c commands and see if I can get some sense out of it with that for now :-)
Thanks,
Martin