Spring RTS Engine

I have noticed that certain buildings / higher tech levels / unit & commander upgrades are only available when I play wide pass. Why is that? Is there sth I should configure/turn on in order to upgrade my commander when playing different maps?

those special units were included in the map.
This unit pack has evolved into a stand-alone game now: http://springfiles.com/spring/games/tech-annihilation-5

Yep, although its version 2.05 now! Here:http://springfiles.com/spring/games/tech-annihilation-7

Fun mod which now has pretty good balance.