That can be done quite easily with the Turbo Pascal graphics, sound and control extensions I created for it. One of the added functionality is the ability to load a bitmap image and overlay it with graphic and text content. Perfect for a visual novel
On a side note, Turbo Pascal is a very user-friendly language and if you know BASIC then it should all sound very familiar. I would also spring for the TP3 manual on Amazon which goes for under $10. Just be aware that the TP editor does not work well on the Adam unfortunately, so you have to use an external editor like ED or ADAMED.
Regarding editing the slide show program, once you have edited the source file (SLIDESHW.PAS), go into TP3, select Y for error messages, press O to go into Options, press C for compilation to Com file then press Q to exit. Press C to compile and enter <drive>:SLIDESHW then <ENTER>. The program will compile. Press Q when done to exit TP3 and presto you are done
I could do it for you, but if you plan on learning TP3, this would be a good start!