How do you make them to spawn there?
look at this video:
Bully SE: Complete mayhem hardcore edition
How did he make that?
I though I already told you. I just changed the peds and weapons ID in the script and changed the fighting styles in ide. Lua scripting wasn't involved in that mod.
This is the list with all IDs that Madman and Steman made:
http://www.bully-board.com/index.php?topic=15013.01. Open the mission you want to edit with hex editor.
2. CTRL + F and change the data type to Hex-values.
3. Check the list for the character you want in the mission and the character you want to replace. For example if you want to replace Edgar in his boss mission with Pete then replace 00 B6 42 with 00 06 43.
4. Search 00 B6 42 with CTRL + F and replace it with 00 06 43 (if 00 B6 43 was found more than once you may replace it again).
5. Save the mission and start it (normal method or with the arcade machine).