A boot loader that will run different file systems?

I have been fixing computers for many years and have collected a large amount of bootable utilities that are of all different file system types (linux, dos, etc.) with their own menus and GUIs created by many different people. I would like to create a bootable menu system with all the ISOs of all these disks as a list. Even better, I would like to separate all the utilities and then re-organize them into one large complete menu with sub menus or a GUI like bartpe or unetbootin. Also to have this bootable from a flash drive would be awesome. Does anyone know a system to go about doing this? Maybe know about a tutorial? Thanks.