Use Of An External .txt In Presentation?

I'm creating a presentation for a client and in this presentation I need a lead up page which has a series of editable text fields, and I'm not quite sure where to start.

1. There is to be a field where the client can punch in thier number and it will bring up information which is stored in an external database (Excel?), if they don't know their number however, they then have the option of filling it out manually. I then need this to immediately create a new .txt file which will become this customers reference (provided one doesn't already exist).

2. Any information that is edited during the session needs to be able to be SAVED to an external .txt file (as above), which can then be called upon if the same client (number) is typed into the field mentioned above.

3. The presentation then moves on to a customisable shopfit, where the client decides how they want their shop to look (this part is already complete and tested and works fine). However, at present I have a print button which the customer can select and it will print out their options, but it has been requested (as I think the reps like to leave their printers in their other suit jackets) that I have an email option, this needs to email the picture (which normally gets printed) AND the information which was entered into the customer reference page.