Just got 2 Co2 tanks, what now?

Hey all, my husband works at a scrapyard and got the deal of a lifetime yesterday, 2 full 25lb Co2 tanks for $5. So I know we need to get one of those regulator things to hook on to the tank, but I'm wondering do I need to run some sort of tubing with holes or how should I hook it up to the regulator to disperse the Co2 into my tent? Were running a 6 dwc bucket system and tote in a 4x4x7 tent. Also need some help on how much to disperse, and should I change the amount of co2 depending on cycle? Any help would be appreciated thanks a bunch! =)

Cool, Yea that regulator thingy you need be sure to get one with that tall clear Gage on the top that measures the cubic feet per minute. I tried to save money and got one for an aquarium that has a bubble counter. No way to convert to CFM and dont know how much to use. Anyway the regulators fitting fits that 1/4 clear tubing you use on fish tank air pumps. just run that above the plants and let it drop. Its best to start with a gang valve and run separate lines then one line with holes in it. More even dispersal.
Once you are setup here is a link to a calculator that tells you how long to run it. Put in the size of the room and 1200 ppm
http://www.hydroponics.net/learn/co2_calculator.asp

Thanks a bunch Cruzer! Much appreciated! =)