Is it possible to have more than one certificate on one machine, and
alternatively choose which one you want to sign with?

Sometimes, I do install scripts for clients, and would like to be able to
sign with their certicates rather than mine. OK, scratch that! My clients
would like their install to be signed with their certicates... <bg>

Prefer to ask before trying, don't want to screw up my certificates
either....

Thanks for any advice (If not possible suggestions for alternatives). I
guess I could always use virtual machines....

Bernard