quoted

What happened when you tried to run the installer?

  It simply says "Command not found" though I could execute
other binaries like ls or whatever came with root-be-0.03.tar.gz.

  I think I see what's happened.

  I extracted root-b-0.03.cpio come with Linux-installer-0.1d.tar.gz 
again and did "file ld*" in lib.
----------------------------
% file ld*
ld-2.0.4.so:    ELF 32-bit MSB dynamic lib MIPS RS3000 Big-Endian Version 1, dynamically linked, not stripped
ld-linux.so.1:  ELF 32-bit LSB dynamic lib 80386 Version 1, dynamically linked, not stripped
ld-linux.so.1.9.5:      ELF 32-bit LSB dynamic lib 80386 Version 1, dynamically linked, not stripped
ld.so:          ELF 32-bit LSB executable 80386 Version 1, statically linked, not stripped
ld.so.1:        ELF 32-bit MSB dynamic lib MIPS RS3000 Big-Endian Version 1, dynamically linked, not stripped
ld.so.1.9.5:    ELF 32-bit LSB executable 80386 Version 1, statically linked, not stripped
-----------------

  Probably ld.so for x86 was called when I tried to start
installer.

# Why x86 is here???

  Anyway, I got mkswap from util-linux and everything is ok now.
(though I couldn't find it in root-be 0.03.)

  Thank you, Alex.

-Masashi Sasahara