Uffest

I don't have it installed on Steam but I think you should go to your Steam root folder where all your games are installed, find Shock Force 2.
Game Files/Scenarios
Game Files/Campaigns
Not sure about mods.

CMSF has an advantage over other titles on 3rd party scenarios because the old CMSF1 came out before the Quickbattle generator had matured. If people wanted to see a particular force arrangement they had to make the scenario themselves! So CMSF has a large catalog of 3rd party scenarios to choose from (CMSF2 can play CMSF1 scenarios no problem). A few of my own old scenarios are in the pot, though I frankly can only remember of of them - 'Lone Star Shopping Plaza'. I've completely forgotten about the others.

These games have always had weird and sometimes funny spotting issues. There's been a couple of times now when I've had units fail to spot an enemy tank in the middle of the street at close range, but they spot enemy infantry BEHIND the tank. Then my units start shooting at the infantry, only to have their bullets bounce off the enemy tank right in front of them that they still can't see.
I remember another situation where I tried to close assault a buttoned-up T-34 during a night-time scenario. I had an infantry squad run up to the tank in the middle of the street so they are surrounding it. I told the infantry to literally go into the same action square that the enemy tank was in, so they could literally reach out and touch the tank if they could. Some of the infantry would have had to walk around the enemy tank to find a spot to lay down. The infantry proceeded to sit there next to the enemy tank for multiple turns without spotting it. I can't remember how many turns went by. Four, maybe five? In fact, the buttoned-up enemy tank spotted my infantry first! The tank went through that long delay cycle for acquiring targets at extremely close range and then machine-gunned some of my guys laying down right next to the tank. That was a real head-scratcher, that one.
Every time I've seen weird spotting issues come up though is when units are at extremely close range. I've never noticed weird stuff happen at really long ranges, so that's interesting.