Different welcome messages

Me .. Again.

Well, this time i was thinking.
In my welcome message i have added Ad spots which people can buy.
And then i have my VIP (Premium member) group.

So i was thinking;
It could be cool if i could make a different welcome message for the VIPs which doesn't show Ads, since my Premium Members pay to be Premium Members.

I'm not sure if this is already possible, but i haven't found a way to do it, if it is.

Thank you,
Killer1993