Backup my bootcamp partition with time machine ?

I have read a few discussion about this subject here in Apple Support Communities but none of them was really new.

I read that it is not possible to backup my bootcamp partition by using time machine. Does anyone has any up to date ideas on how to make this work in the best possible way ? I am on os x 10.8.4 and I use bootcamp with windows 7. I want to abe able to backup all my osx data, all my bootcamp data + an external hard drive data that I use for my windows files.

Alltogether in one hd.

Thanks in advance.