No problem, added the screenshot to the OP.
I added the source code so (rightly) distrustful people can check and/or compile it themselves. Still, I understand why this is needed, so added to the OP again, checked with NOD32. And I recommend anyone who downloads it check it for themselves. You never know, right?
Yes, the original project name was Rappelz Merchant Adder, but halfway through I noticed how lame that sounds lol.
Next release, I'm adding the item list as an XML, and, I guess the Merchant List as well. I'm about halfway through on the item list thing, and also adding a small window to add entries to the XML(s).
Don't know about the category thing, I realize now they were completely arbitrary, but changing that could be kinda difficult the way things are coded.
I'll have to think about that one, see if I can make it work.
I have a question though, see if anyone can help, who are the following Merchants?
Beginner_itemUP_suppert<----I suspect these are the smiths, but they don't sell anything :/
flat_sum_deva_weapon
flat_sum_asura_equip
Ancient_relic_equip
inhance_helper_randombox
flat_sum_mare_etc
flat_sum_Ancient_relic_equip
flat_sum_rondoh_weapon
darkwood_event_etc
flat_sum_beginner_etc
flat_sum_asura_weapon
deva_itemUP_suppert
flat_sum_deva_etc
Asura_itemUP_suppert
crushop_equip <-----------The cru ones I assumed it was city of ruins, I may be wrong, has anyone tested this?
gaia_weapon
secroute_tickets <----I put this is as the scroll merchant, haven't tested either

flat_sum_gaia_equip
flat_sum_desert_etc
desert_etc
flat_sum_asura_etc
Ancient_relic_weapon
flat_sum_rondoh_etc
flat_sum_rondoh_equip
flat_sum_gaia_etc
Rondoh_itemUP_suppert
Gaia_itemUP_suppert
bearload_eventshop
Creature_card
NPC_Event_Japan_summer
crushop_etc
flat_sum_Ancient_relic_weapon
beginner_equip
flat_sum_Ancient_relic_etc
flat_sum_gaia_weapon
official_riding
secroute_etc_KR<-----------I kept this one, but I dunno who he is
Ancient_relic_etc
flat_sum_deva_equip