Here is what I am planning to update :
(1) Talents: I am going to start with the talents from d20 modern so each attribute would have 3 talent tree. And the I'll move on to pathfinder equivalent. D20 already have some of it so I'll move to those from APG. Classes hoping to convert:
Fighter, Cleric, Wizard, Druid, Oracle, Rogue
(2) For gun rules, since d20 modern uses defenses ( i.e. you gain something akin to natural armor as you level up and you do not need to wear armor). Now Defense would make up part of the Touch AC so I guess to balance things up ( and not nerf guns so much) , I think when making attacks with guns, you lose the Defense bonus?
What do you guys think of the gun rules?
Would be posting up some talents ( starting with Smart as I go along)