Cortex wont let me make a css server more then 32 players, is there anyway i can go around that or if insomnia can make the max slots for source bigger?

Has this changed? I thought the max the game could hold was 32 people. If it can hold more then it won't be hard to fix that in an update. For now though add the -maxplayers cvar to your CSS instance's command line and restart your instance. That should get you around the limit.

I think the engine max is 256, but that would be extremley laggy and annoying. The max built in spawn points is 40 but there are mods where you can add extra spawn points.

The most I have seen is 64 players.

same here