Is there any way that I can have some text scroll as my server is populated? I would just like to have a couple of lines of text inputted every few minutes.

Unless someone codes it there is no such thing. You can only set sv_motd for the message of the day that is displayed in the welcoming message when someone connects.

is that in the server.cfg or the config.cfg that is easily modified?

Found it, nevermind, thank you very much.

(in the server.cfg)

Well the example server.cfg does not contain every variable there is.. so even if it were not in there you could just add it

Why not update it to contain the most important ones? I'd call motd important.

It there.. line 24:
//sv_motd "" // this message (unless "") is displayed to players on connect

As the example file explains people just need to remove the // in front of the line and set their message.