Bootcamp Assistant problems...

Hello all, I just got my new macbook and I am having a problem with the bootcamp assistant. I put in a 160gb hd.

I have two partitions, my main drive is 115gb and my second is about 34gb. The smaller partition is set up for time machine so if I accedentally delete something I can recover it (not if my hd dies).

I want to set up about 25gbs for bootcamp and planned on using bootcamp assist to partition from the main partition. When I start the program up it tells me: The startup disk cannot be partitioned or restored to a single partition.

so does this mean I cannot have a time machine partition and bootcamp? I will have to reformat the whole drive to do this?

Any help would be greatly appreciated.

after windows is installed i should be able to partition the time machine backup again correct? And if yes can i transfer what's on the backup already to an external hd and back again after the installation without problems? Thanks for the help even though these questions seem obvious.