Automating On IMac-Tiger

Hi

I am presently working on IMAC. I have to automate the serial number screen of an application.Suppose I have installed MS Office on IMAC and want to add serial number automatically when serial number screen appears.
Can anyone guide me how to automate it.

Thanks in advance,
Tagro

Apple Script is the answer -- Use it when Support for Assistive Devices ="On" on System Prefrences of MAc (Worked fine for Tiger and Leopard )