UNetbootin: multiple frugal installations to hard drive?

Hello, I was wondering if I could use unetbootin installed on my hard drive to run miltiple linux live distributions?

I used UNetbootin to add a working RescaLux live cd to my windows metro bootloader. That was great, because EasyBCD only supports Windows based iso files, not linux based.

I was hoping to add a bunch of recovery linux distributions to my Windows BCD Boot entries, but I quickly discovered that UB only can handle 1 linux boot entry at a time. If I want a second disk added, UB removes the previously installed files and begins again from scratch...

I was hoping there'd be a simple way out? I gave a quick look at GRUB4DOS but... Looks old and I don't want to change my MBR - it's windows based and it should remain that way I have a small primary partition (FAT32) that is active and bootable. It also contains the BCD (Windows 10). UB installs the \boot files for Linux distro to my systemdrive (which is "C:" - the FAT32 partition is ignored by Windows and I put it on "G:").

I feel so close yet so far away... Certainly I'm not the first to want to do this? Thanks in advance!

Peace!

Devnullius