Leeched from DS (yes I am the l33ch king )
1-Download the filter enclosed and activate it.
2-Make sure the toon you want to dupe has at least 1g23s45c
3-Mail yourself a plain letter with 1g23s45c et voila look at your gold
Recomendations: if your gold goes above 214000 you can't send letters or buy stuff. You will need to blow cash on Auction House or trade it to someone (or yourself by dual boxing).
WARNING: fixed in all scape's servers and all servers with rev 4.3-TRUNK r4242 so hope it still works on your server.
Filter (WPE pro) ->
Code:
http://www.sendspace.com/file/g5i4vp