Things have gone this far:
1) I can't use any USB-stick above say 1gig to boot MenuetOS
2) BIOS update seems impossible because neither floppy or CD-ROM images work
3) Hiren's to a DOS with USB support enables EMM386 and installs DosKey etc.
4) Hiren's to a DOS wihtout USB support hasn't got any of them installed, but where can I get access to my USB

There's a saying in Estonian: "Saba kinni, nokk lahti" (Tail stuck, beak free) from a fairytale with a crow sitting on a tar-roof.

I'm starting to give up...

Btw, if you have noticed, there's a 4GB limit in 32-bit OSs, but there's no driver/application support in 64-bit. We are living rough times.

Good luck everybody,
Madis

PS. And keep me posted of any luck found