How can I setup a shared SSL to be used by several users on multiple servers? Basically, I have the SSL certificate. I want my resellers to be able to use this for their billing transactions.

Any help would be appreciated. Thanks.

Using:
Cpanel + WHM
Red Hat Linux

you can use the the hostnames ssl https://ns1.yourostnam.com/~username

or what I like to use https://generic-securedomaimname.com/~username

I don't understand. How would I have them use the same domain and their own username?

log into your WHM and insure mod_userdir Tweak in security tweeks is enabled

you can connect via any ssl on the server/~username

A certificate is going to only work on a single domain. You are going to have to use http://domain.com/~username/ for a shared ssl as dalem said. You cannot purchase a certifcate for all domains.

thanks eth00 thats what i forgot to say