use somebody else's self certificate to sign a macro
 

Dear experts,
I have run an Excel project requiring me to sign my VBA code with a
self-certificate; I have sent it to my collegaues, they have installed my
certificate on their computers and now they do not see the macro warning any
longer, which is what I wanted.
Now I need to pass the project to another person - is there a way she could
sign the macros she generates with my self certificate? This would avoid all
of my colleagues to install a new certificate.

Thank you very much in advance for your help.
Best regards,
--
Valeria