To answer your question see the fourth Q on the FAQ page -
http://www.publishermvps.com/Default.aspx?tabid=30

But it sounds like you don't have the skillset to do it.

From what you have said I would encourage you to fire your host.

Any decent web host supports FPSE.
Any decent web host also provides third party form programs.
Any decent host will support you in the setup and configuration of such
programs they offer.

If your host doesn't do those things why are you paying them?
even free hosting providers like Tripod provide FPSE.

Web Hosts are a dime a dozen and then some. So you can find a dozen better
ones just around the corner.

On my page - www.davidbartosik.com - I state my recommendation for web
hosting that I use myself and for client sites.

David Bartosik - [MSFT MVP]
www.publishermvps.com
www.davidbartosik.com