So the cause of this troubles are not other mods as I see. I installed the mod in these steps:
1) Downloaded OpenJK and extracted every content of the archive directly to GameData folder (resulting in having in GameData folder dll and exe files of OpenJK with new folder OpenJK).
2) Downloaded DP, created the "DP_Chapter1" folder in the GameData folder, then extracted to this new folder next files:
- DP_chapter1.pk3
- dpico.ico and gamestart.cfg from DP_unzip archive
- everything from add_OJP archive
3) Extracted bat file to GameData folder.
4) Launched bat file.
Numfast
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