LOADING multiple ISOs into a USB stick

[Guest]

I have a 16 GB USB thumb drive that I want to use to put many ISO, particularly OS X and Linux distros, to try out other operating systems, whether it's from VirtualBox or as a live disk. However, seeing how there's a lengthy process on booting multiple ISOs from a USB, I'm concerned if there are problems/issues/exceptions to just downloading a bunch of ISOs into a USB. Other than drive capacity, is there really anything I have to worry about?

BTW, the ISOs I want to download are:

Lubuntu

SteamOS

Mac OS X

Ubuntu Studio

[kameshss]

Check this! 

 

http://www.pendrivelinux.com/tag/multiboot-usb/

 

Yumi 

 

MultiBoot USB

 

XBoot

[Geralt]

I believe you'll need some sort of a bootloader. The user above has cited some bootloaders that you can use.

[techguru]

doing the linux oses will be fine and simple

but the OSX one will be a real pain to get working properly