I would give it a try, cos I'm not so sure anyone else has
The only difference between the mi8 soldierspawn and mh53 spawn I can see is that on the mi8 the spawn is addtemplated to each passenger pco,
whereas the mh53 spawn is addtemplated to mh53passcommon only and then mh53common is addtemplated to each pco.
Maybe change them so that they are the same.
If this is a serverside map use ObjectTemplate.Active and ObjectTemplate.RemoveTemplate
Another option is to remove all the passenger seats out of the vehicle eg:
ObjectTemplate.active MH53Complex
ObjectTemplate.RemoveTemplate 27
ObjectTemplate.RemoveTemplate 26
ObjectTemplate.RemoveTemplate 25
ObjectTemplate.RemoveTemplate 24
ObjectTemplate.RemoveTemplate 23
ObjectTemplate.active Mi8complex
ObjectTemplate.RemoveTemplate 16
ObjectTemplate.RemoveTemplate 15
Not sure if that would have the desired effect tho.
![Confused :?](./images/smilies/icon_confused.gif)