Yes it's true, you can boot most linux systems and PC-BSD together without using GAG or some other unusual bootloader.
VectorLinux 5.8 SOHO beta 1 includes GRUB version 0.97-i586-2VL58, an amazing piece of work that not only recognizes
PC-BSD and Linux distributions; it also boots them.
Simply install your PC-BSD bootloader and then install all of your linux distros in their partition and lastly install
VectorLinux 5.8 SOHO beta 1 in the last partition and when the installer asks which bootloader choose GRUB.
Install to a formatted floppy(oh yes--those funny looking archaic things)
Reboot with floppy in select your choice (three guesses what that will be?)