[race_zyzy]

I am a new modder and I thought I would like to make a mod that does the following:
When you pop-up the stats for an item in packs, if there is a corresponding body part item already equiped it would show you the stats of the item equiped next to the stats of the item in packs. I am not really sure where to start on this, so any pointers or mods that do similar things would be much appreciated.