Unless you are automatically /whois'ing everyone, most people want to see the results when they type it. But if you really want to move it to status, you will have to go into iraws.mrc and find the correct RAW numbers and change aecho to secho:
Example line (probably not one that you have to change... I just grabbed one quickly).
raw 203:*:{ aecho $2- | halt }
If you don't know which ones are for /whois, look at
http://www.mirc.net/raws/ and look to see which numbers you'll need to change. Don't change anything else except aecho to secho.
You can find me at #Invision on irc.irchighway.net or #OldGames on irc.undernet.org if you need me for anything.