i suspect one could maybe rip out the roller from here:
http://www.rpgobjects.com/index.php?c=orpg

or use it as a example.

and yes, the number after d indicates the number of sides on the dice.

often one will see 2d6 or similar, meaning that one should roll 2 6-sided dice.

and if one see d6+20 thats a 6-sided die plus a flat 20.