here a new way of duping
need to run msh to memory login data
1 open are dont login in yet
2 open msh than login games
3 the person which msh give item to other make sure other dont login out
4 now the person with close the game dont logout just close (X) or ctrl +alt+del close)
now login game again other still have your item and u still have item in your inventury too
is working very well while is lag