Winbuilder script adding drivers and programs

I know, is probably a faq, but searching I found many discussion a get a big confusion and headache.

So.. There is a tutorial o a step-by-step guide to:

How to adding drivers, for example from driverpack?

How to adding personal programs? For example I buy drivesnapshot from tom elhert, and I want to add that.

Thanks in advance for any hint and advice.