Yes, that is the correct one. The warning was put in place in case someone tried running it on a real Mac so as not to screw up their system.
The newest NBI is 0.8.5Pre, but it is a pre-release and has some bugs. A newer version is supposed to be coming out, but hasn't as of yet.
I would use the one you listed.
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