You'll see something like this in your hosts.cfg:
associated with that host. Just make a new checkcommand in checkcommands.cfg that runs a script that doesn't really do anything, then change your hosts.cfg check_command to that. Heres an example:
then heres your /bin/return_ok.sh:
echo "PING OK - Packet loss = 0%, RTA = 0.16 ms"
And heres your new hosts.cfg definition:
alias Colocation Server 1
(change as necessary)