[rescue] sgi onyx cpu upgrade help

[Robert Reif]

I'm replacing an IP19 with an IP25 and I'm having
problems reinstalling the necessary software to boot.

The hard disk has 6.5.15 but I only have CDs for
6.6.12 because I downloaded the newer files. The
newer files are on another hard disk.

What are the minimum packages that I need to downgrade
to get a system up and running again so I can access
6.5.15 on the other disk?

Thanks,

Bob.