I have an excel sheet that resides on a network drive, which is
supposed to run a macro when it starts up, however the users security
settings stop it from running. So I decided to try and get a digital
certificate from CACert, a free certificate place.
I have created a client certificate from CACert, and added it to my
personal certificates, but when I got to sign the excel vba project my
newly added certificate does not show up in the list.

If anyone has any idea why this CACert is not working, or how to
attach it to my excel project, or perhaps a better way to achieve the
same result it would be greatly appreciated.