I found small (or big) bugs/exploits on L2 WorldWide x1000 PvP server.
So we'll start.
You need Maestro (char with many CON, preferably 80 level), go to Custom Areas >> GM Shops.
1. Buy dye +5 CON -inert.
2. Buy Doom Heavy set (+3 CON).
3. If you have 2GB buy Tattoo - Weight Boost (S80) +40% weight limit.
4. Your inventory must be empty (only adena), and you need 350-400kk adena.
5. Go to Royal Shop (GM Shop) >> Usefull items, and buy 2,700,000 Cursed Bone (130a each).
6. Now again open Royal Shop and sell all Cursed Bone (150 each).
7. Enjoy you have more 54kk adena.
Other exploit.
You can enchant skills without book Giant's Codex.
Regards ;D