OSDev.org

Thanks a lot!

The big question is, is it enough to put that table in my boot loader (the first 512 bytes) or does the disk image that I want to put on my USB stick really needs to be formatted in FAT?

well
put it on, and insure that the boot sig is on, and fat, is only used if you use it.
you can put what you want, just be aware of emulation( bios), since it handles different from computer to computer( some sees usb as floppy, some as hdd )

KMT dk

Okey I'll test that when I get home. But does it matter which filesystem I actually got? Is it enough just to put that table in my boot loader and then everything is as usual? Or does it mean that I need to do Anything else that has to do with FAT?

if your os uses fat, then format it with fat, if you dont use, you dont have to care, just put the img ( data) onto the disk


KMT dk

So far from my test, if your bios user's hdd emulation, you will be OK, but if your bios user's only FDD-usb emulation, than it needs a BPB to boot.