I got this off another site..so I'm gonna post it here :P
Editing Conquer.exe to open many clients:
1. Download a hex editor (search on google)
2. Open Conquer.exe with the hex editor
3. Go to line 3EF90
4. Change
0003ef90h: 54 5C 54 00 8B F0 85 F6 75 0A 43
83 FB 02 7C 83 ; T\T.?ð?öu.C?û.|?
To this:
0003ef90h: 54 5C 54 00 8B F0 85 F6 75 0A 43
90 90 90 EB 83 ; T\T.?ð?öu.C???ë?
You can now open as many as you want