Critical rolls on Pathfinder Simple sheet

Starting up a new campaign and I decided to go with the Pathfinder Simple sheet. I noticed that the sheet's macro for crits just rolls the crit damage and multiplies the result, rather than actually rolling the dice again. There's also no way to specify non-multipliable damage like precision damage. I'm not super good with html or css, so I was hoping that someone on the forums could maybe help me with altering the sheet.

I opted to just cut out the part of the sheet's code that does the damage rolls, letting players make their own damage macros instead.