[Neuro Toxin]

You have to edit and recompile the server binary most likely as its a hard coded limit.

Would probably have to edit and recompile the client binary is the hard coded limit most likely occurs in their also.

You could link two servers together and say have them sending rcon commands between eachother for all the client positions, models, angels, buttons, animation sequence, ect. Which would make a server appear to have more players, but you would have two seperate servers at the end of the day.