Phillip (or Philip, whichever the case may be),

is Does it generate more money than it costs?

Can you develop a template for it that will allow you to transfer text formated pages (or Word.doc pages) into a screen-play format?

Are there already templates developed you can buy and use?

How much work is involved in the conversion?

If your normal price is $1.00 per page, how much do you charge for the added service? $2.50 per page?

Does this client belong to a writer's group he can recommend your service to or is he a loner?

Do you want to start advertising this service to create an additional income stream?

Do you want to create a manuscript division for novels?

Frankly, I'd go for it and even if I didn't make a dime on this one, as long as I broke even, I'd use it to generate future business by advertising it.