It steps through the list of skills and if the 'successful' checkbox if ticked then it adds 1d4-1 to the skill and clears the checkbox. The ability to mark the skills is already implemented on the sheet -- SKILLNAME seems to hold the value of the skill, and SKILLNAME-check exists and has a non-zero value if the box is checked. I started to play around with scriptcard, but it has been a while since I used it last and I seem to have forgotten everything I used to know about it.