Text Change / MUI_PAGE_FINISH

My autopatcher is finishing with MUI_PAGE_FINISH which then launches an executable but I would prefer to customize the text on page and the text on the button. How do I do this?

It's all in the readme:

(pro tip: Search for 'finish'.)

I apologize I see how it works now. Thank you.

I did not see anyhting about hiding the back button though, any ideas?

To disable:
GetDlgItem $0 $HWNDPARENT 3
EnableWindow $0 0

To hide (perhaps you should first disable it, can one of the gurus reply?):
GetDlgItem $0 $HWNDPARENT 3
ShowWindow $0 0