Equip System

I searched the forums and found didly, soooo....

I need a system that does this:

TIME FOR A STORY!

Arthas is walking down the road when he spies a hammer lying on the road. He picks it up and gets +10 damage! (No problems yet!) Further down the road Arthas aquires a set of plate mail armor! (Still no problems.) In town Arthas tries to buy a shiny new sword, but can't buy it because he already has the hammer equipped. So he drops his hammer and viola! Shiny new sword! Later at the local leatherworker, Arthas feels like a change and tries to buy a set of studded leather armor. Too bad for Arthas he has plate mail equipped. He drops his plate mail and still can't pick up the studded leather because his class (Paladin) doesn't use leather.

So...thats what i need it to do. I tried using the FFORPG trigger, but it wouldn't work.

Check the resources if there is something you like there
EDIT:
Take a look at this http://www.wc3campaigns.net/showthread.php?t=83503

I have the same problem, the link you gave dosnt solves anything and leads to bugged system. I dont need all bags and stuff, all i want is to make a class use a couple items (they may be crossed, like cleric and warrior can use leather armor) but still - no bags, just plain one item of a type checker and class checker.

That's easy triggering, I have it on one of my oldest rpg maps, I will see if I can find the trigger for you.

Well, i solved the problem of picking up multiple items, I still have to make class specific items