I actually had this very same question in relation to the ready to install dialogue myself. And basically the trick is that you want the following

Set text “Register Later” to control ID “$Next_Button$”
So, that should hopefully fix your registration dialogue button issues. How I manage to figure this out is I wanted my next button on my ready to install dialogue to read “install now“ and so it’s been a fun ride trying to figure that one out.

As to making sure to hide the registration dialogue, if I may suggest create a radio buttons dialog asking if the user wants to register and grabbing that response like as follows

[code] if %SB_RETURN% = 1 then
Hide wizard dialog $REGISTER$”

Just some thoughts, hoping this