know how to grow, but novice at breeding. help?

Hey everyone, I recently discovered that two out of my 4 plants are male.
there two thai stick each about a foot and a half tall. And I have two other's right next two them which I put into flowering at a very small age. They are about 4 inches tall and I want to breed them with the two thai stick males. (obviously they are both female). One is a thai stick and the other is a white rhino. (I can't wait untill I have a white rhino/thai stick cross breed).

Basically I want to know about harvesting time for seeds. How long untill the pollen sacs open and fertalize the females? (they have been in flower for about a month). How do the seeds form and how can you "harvest them". And just general information about breeding plants.

I really apreciate any help you can give, as I said above...I have had successful grows but I'm a complete newb when it comes to cross breeding and what not.

Here you go, hope it helps.

Breeding Marijuana

Awsome bro. Must have missed it when I was googling. lol. thanks.
Also a question about sterilizing a grow room once you have successfully pollinated the females.
Because I only have one grow room and only wish to polinate once...how can I be sure my next crop
does NOT get pollinated with pollen left from the last males? Can I spray the room with anti-bacterial
spray or something to kill any left over pollen that may conatminate my new females? I would hate to pull all my males only to find
out my females got polinated from left over pollen. Anyone have any exerience with this? thanks.