Questions about check_nrpe

Im getting mad with this plugin.

See, im using a quite old version of nagios (dec 2008 - upgrading next week) and im trying to monitor a remote linux system

If i define a service as

But i still did not guess how to send more args to the remote plugin

I mean, if i want to have a warning with 2 users, and a critical with 5, how would i have to specify this command?

I know the post is old but:

    check_command                   check_nrpe_args!check_users!2 5