Arena server setup....help please

Im trying to set up my server as an arena server.  Im new to having a server, so any help would be great...Thanks!

So my server has a 28 person capacity.  When we run arena, it defaults to 3 teams of 6 max.  How do i increase the max players to say 10v10 w/ 8 person bench.  I have been told its not possible, yet i have played it on other servers.

Also, how do i turn crits off?

how do you set the max ammount of players on a team anyway?

I have no idea....i think it just fills to server capacity....but i really don't know

There is a boot line (I think) to turn off crits.  I know mods can also be used.

To be 100% honest, I havn't not gotten an Areana server up yet.  My server didn't even get an Areana config with the update :-\

Tonight (or soon) I'm going to try to get an Arena server running and i will try to write some documentation about it in the SRCDS.com forums.  I'll post a link here when it's done

EDIT: If you are new to SRCDS (and you both seem to be), check out the srcds forums.  I'm a Mod there and the forums are FULL of information.

tf_weapon_criticals 0

turns off crits

thanks guys...i figured it out but just an fyi...you have to have your bench or spec slots equal the team sizes ie our server is 9v9 + 9 (we have a 28 player max server)  you cannot have say 12v12 + 4

thanks again