asterisk users - Apr 2005 - distinctive ringing in a queue?

Hi,

Is it possible to have distinctive ringing in a queue?

I've tried:

exten => s,2,SetVar(ALERT_INFO=<Custom 1>)
exten => s,3,Queue(standard|r)

without success. 

However the SetVar(...) works fine when just dialing a SIP device.

Any ideas?