Oh my god ! Thank MikuAuahDark. I read ur Tutorial and follow. It just work perfectly ! Thank you!
Btw, that HexEditor is awesome. Can you tell me more trick we can do with it?
Please be aware that such hacks CAN lead to more or less critical errors. This includes putting multiple entities on the same tile. It may lead to misbehavior of AI, Lua scripts and other - even worse - things including freezes/crashes. This highly depends on the types of the used entities though. Stacking entities which do not affect the gameplay like effect entities probably won't cause problems. Anyway: I don't recommend to "hack" map files under normal circumstances. It may also completely break your map with new game updates and make it unusable.