Now how do I multiboot?

[k1e3w5]

Hi
I just frugal installed
Fossapup64 9.5 Linux 5.4.53
on an old Dell dimension 5150 and it works great.

Is ext4 better than ext3 for Linux installations?

What is a good partition size for a Fossa frugal installation? Would 20Gb be good?

But how do I install another Linux and Multiboot.
For example if I want to install Ubuntu from a CD, will it detect the bootloader and do it all quite easily, finishing up with Fossa and Ubuntu on the boot menu?

[williwaw]

I would do the ubuntu first, letting the ubuntu installer have the default disk setup.
add the frugal afterword.

[k1e3w5]

Ok
What's the best tool to create a Multiboot USB including fossa?
(YUMI works well but has to be created on windows)