Dual Booting FreeBSD or Linux with XP

Will I have to install either FreeBSD or Linux on a separate partition as Windows XP? And will there be any conflicts and stuff? I wanna use FreeBSD but if there would be problems I'll settle with Linux. I haven't decided which distro yet but that'll be later.

>>3
i'd keep the size of both partitions down and make a third FAT32 partition to keep general stuff on.  Both Windows and Linux (probably FreeBSD as well) can read and write to FAT32 without trouble.