Thanks folks for the tips given 
Its hard to use resource governor since customer does have a big environment and to get it active need a great effort that i and the end user can't afford to wait for actually (Hopefully i could charge for implementing it....).
Oh my... i should have bought Tips and tricks,,, Have bought the 2 quickreferences (ASE and Rep) and they are the last books i really enjoyed to buy in quite some time
Ill try first Mike proposal... hopefully i can bear the overhead of getting system datetime every row collected... last time i checked about sytem date time functions theres some kind of lock/flag/spinlock added to the internal routine to avoid getting trashed data on the fly...