Help getting a boot loader

I tried using AIO boot and Ventoy but I can't find something that works with real hardware Ventoy is just stuck on incompatible license while AIO boot does work but can't load the ISO on it as it said error: attempt to read or write outside of disk 'hd0 unless I use grub4dos then it boots but still can't go to grub2 I like something that's mainly like Ventoy or AIO boot that works in legacy bios I don't care much about UEFI and yes thars Rufus but ill like something that can load more than one ISO as an option

im trying to get a USB boot loader and so far nothing has worked if you need to know the main board im trying to boot the USB from a intel D850GB

oddly no it just brings me into the bios but i can set the USB to boot first and works but like i said errors come up but the usb dose boot

i can try

i tried it and can only do a single ISO i want one that can do multiboot

yumi works well but when i try booting an ISO it brings to a grub4dos prompt and from there i'm not sure what to do

how do you not know what a .ISO file is? an iso is a file that hold data for an operating system rather that be windows or linux

windows xp pro SP3