Run Macro in one Workbook From another

Here's the situation:

I have a vba Project that asks the user if he/she wants to add an option. If he or she choses "no", the the sub exits. If they choose "yes" then the code opens a workbook template, saves it with a specific name, and takes the user there.

What I need is for a specific macro to be run, (exists in the template book) only when opening the workbook through this method.

Any ideas?

If you have trouble understanding what i mean, just let me know and i'll try and be more clear.

Thanks