I have talked with an agent right now. and cleared 2 things.
1) I am not getting any rebate in WHT. my car was purchased at Dec-2003 and was registered in Jan-2004. if it was registered before June-2003, WHT would be off on my car. but as it is not, i have to pay it.
(WTH, i started paying tokens from July-2003 and still they are telling me that you registered this car in Jan-2004.)
2) Token can be paid till Sep. If one pays in July, he gets 10% rebate. but this case is not with smaller than 1000CC cars any more, where you have to pay a fix fee. So people who own a 999cc or smaller car, and plan to get life time token, can go for tax payment anytime till sep. so roza rakh k khuwar honey ki zaroorat nahi, araam sey eid k baad...