There's nothing that I can do about what vehicles are spawned. HWS is a dynamic mission generator created by Rydygier. All that I did was port it to the Gabreta terrain, which was a very simple process. Any questions about how Hetman works or suggestions for features/options, should be directed at Rydygier (links above) but I don't think he's working on HWS any longer,

Thanks a lot, but I could use more (e.g. CSLA) tanks (not trucks or transporters) in the front line. Many thanks anyway! :)