Download busybox-1.00.tar.bz2.
Unpack it.
Copy this directory (runlevel) and the my_linux directory into the busybox-1.00
directory.
Change to the busybox-1.00/runlevel directory.
Run the apply_patch script.
The apply_patch script will run "make oldconfig" for you.
Follow the instructions in busybox-1.00/INSTALL.