I want to do something.

I want to load any Extensions.mkext that I want.

for example , I will put more than one Extensions.mkext in DVD.

when I am booting , I will choose a option to load which one I want.

Can I do this?

for example , I will write

boot: -v -mykext:/System/Library/mySpecialExtensions.mkext

and it will load mySpecialExtensions.mkext instead of Extensions.mkext.