Default [Q] Multiboot AOSP ROMs on Galaxy S4

Hey, I was just wondering, is there any way I could multiboot AOSP ROMs on my S4 i9500? I've read about the Rom Switcher app, but it has to be used with a TW Rom as the primary ROM, and other AOSP ROM as the secondary ROM. But I want both of them to be AOSP based ROMs. Is there any way I can achieve this?
Any help is appreciated.