Help> I was gifted small co2 bottles not sure if I can use them.

I currently keg my beers. My Swimbo's father had two CO2 bottles he used for soda pop. He was walking them out to the trash when she noticed and grabbed them for me. They don't have a traditional top on them, and I'm not even sure I can use them. If anyone knows how I could hook them up to a regulator, if they are not too old... well, any help would be appreciated...
Here are a few pics. I'd really like to take them to parties, and camping if possible....




Thanks in advance,
Ryan

try one of these......looks like a pin lock valve paintball style tank to me.......

http://stores.kegconnection.com/Detail.bok?no=268

or

http://stores.kegconnection.com/Detail.bok?no=312

Ferris, thank you so much! I think that is what I need for these. I wish I could measure them to verify. I've never done paintball, but I bet they are the same... I may take them to the brewshop with me today and let the 'kids' there look at it, they'll probably know better than me.

If I were you, I'd go with that converter considering that you prob already have a typical regulator. Good find on your swmbo part!