Changing text in fixed text box

Thanks Andrew and good afternoon from Belgium ;-)

I'm not too fond of the characters in the Rise scenario blocks and the background is always blurred, so I wanted to create sth similar in SL.

I created a new layer for each new background but I don't know how to use a text variable for the phrases in the text box. Can you please give me an example of how to approach this? (scenario screen attached)

Another question: can I reuse the 'Next' button on the base layer in the other layers? I can only add a trigger to it in the base layer!? So should I add a new button to each layer?

Thanks for helping out Andrew, much appreciated!

Dirk