so after a couple of posts about creating a multiboot flash drive, i created a script that should automate it a bit which is located here.

as of time of writing:
it formats the disk
installs grub2
boots debian netinstall 32 & 64
boots fedora 32 & 64
boots gentoo 32 & 64
boots kali 64
boots netbsd 32 & 64 (broken though)
boots openbsd 32 & 64
boots tails 32
ubuntu 12.04.4 lts 32 & 64 (broken)
ubuntu 13.10 desktop 32 & 64

enjoy