Item Creation help please

Ive read this guide at link; http://stuweb.cms.gre.ac.uk/~hj128/guidemain1.html

now im not getting "Uknown Item" in game any more but instead im getting sprite errors, is it possible to add a new item using a sprite thats already in the files rather than adding a new .act and .spr for every new item i make? also if some one who knows alot about Ragnarok Online servers could add me to msn or let me add them, so i could ask about the server files and othe r general stuff im having problems with, I would be very grateful

Thnaks

Yes, you can use other item's sprite instead and all you have to edit is your name tables server and client side. just don't change the name of the item, you may change it's attributes and JName for your new editted item.
hope this helps...