How to dupe maple coins and stuff at v62 server

Lately I was watching kids duplicating maple coins at the servers im playing at..

And I want to dupe items too...but i have no idea how..I was trying to look for guides in youtube and in other websites..

and I just couldnt find any easy guide

So My request is if some one can please tell me in the easy way,how to dupe maple coins and\or other stuff at maplestory v62 private servers

I already have TimbusPE and winject.exe

I just need to learn

Thanks and have a wonderful week

As far as I know, it's not easier than the youtube tutorials and this should have been posted in the help section.