I think the above numbers are just about right. That's what I use, 3 supply trucks, 2 chinnooks, and 6 workers. Having dual supplies at once dock is useless because only one collector is allowed at a time.
Okay, just take all the files in the contra folder (click+shift+down/up arrow), and extract (or copy and paste) to your zero hour folder. It worked for me, I thought it was only for those with first decade (or vista...)
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