Installing FreeBSD on Windows/Linux Shared Enviroment

[Intel69]

 Hi,

 I was wondering, I am about to setup a computer I have to run Windows
XP, Ubuntu and FreeBSD.

 I wanted to know if it was possible to run FreeBSD and Linux on the
same computer.

 If I can, do I have to partition my disk in 3 parts? I have a 80Gb
IDE that came with the dell... would be like 28Gb to each partition.

Thanks for your help.