Nissan Repair: Timing Belt Installation, haynes manual, nissan engine

Question
My question is with regard to Nissan engine CA18 (1.8 litre DOHC Injection Turbo).
In the process of removing the the timing belt to replace a faulty water pump, I did a mistake of not marking the pulleys. Can you help me on how to correctly re-time the cams in relation to the crankshaft? How do I check whether the cams are correctly positioned before actually starting the engine?

Answer
Yahaya,

You are going to need a book for this.  Get a Haynes manual or go to the library and photo copy the position of the cams.  I cannot really describe it properly with just text.  Or, go to nissanusa.com and download the .pdf file of the front of the engine with the proper position of the cams and other gears.