I made a new mod for Van Helsing 1
https://www.nexusmods.com/theincredibleadventuresofvanhelsingfinalcut/mods/3/

CHANGES:

- Added Bossfight music to Cave Boss (in Scenario Mode).
- Increased Resistance of Cave Boss from 90 to 99% (in Scenario Mode).
- Fixed Wail of Vengeance Skill (Alternate Damage Calculation)
- Added Resistance Guardians to the following Scenarios, which trigger an Van Helsing / Lady Katarina Dialog upon click:
=> Cave
=> Cave Boss
=> Fenyves (Croakwood)
=> Vitisztito (Rookery)
=> Gyarnegyed (Dreadworks)
=> Ink4 (Poketrealm)
=> Nagyerdo (Galowsbog)
- Added *.webm Videos for better support if you're using Linux

HOW TO INSTALL:

Just copy & paste the files in your Van Helsing 1 installation folder.
If you want to, make a save copy to restore the original files.