I think I know what he's doing, this however is a very old exploit, only works on very few servers.
1. You go to a soulshot vendor and double click on soulshots, then when you select how many soulshots to buy.
2. Go to the weapon shop and double click the weapon, then your l2 will jump back to the soulshot-amount-screen.
3. Select how many weapons/armor you want in that slot that you feel safe you will make it to +25 or w/e is max on your server
4. Press OK and you will have to pay for the items, BUT they will all be in 1 item slot so when 1 d/e that other 20 are still left in the same item slot, with the + enchants.
This might seem a bit confusing but....it seems like the thing you described.