NetBookMaker is a program you run to prepare your Install USB key once you have your DVD image restored to it. It "makes" it into an installation key.
NetBookInstaller is the program that it installs into the utilities menu. You run it after you complete your OS X installation to install the boot loader, and kexts in order for OS X to run properly on the Mini.
Mini 9 | OS X 10.6.7 | NBI 20100616212351| BIOS 05 | 32 GB Runcore | 2 GIGS RAM
10V | OS X 10.6.7 | NBI 20100616212351 |BIOS 06|160 GB|1 GIG RAM| 6 Cell Dell Battery
Back up Mini 9| OS X 10.6.7| NBI 20100616212351| BIOS 05 | 32 GB SuperTalent | 2 GIGS RAM