How can I view security cameras connected to one pc in my home lan on my other pc's on my lan?

yahoo att wireless dsl with 3 pc's on wire and 1 PSP using wireless. One pc has 3 video cameras and tv card and 2 usb web cams.

How can I view security cameras connected to one pc in my home lan on my other pc's on my lan?nba draft history

someone sounds paranoid, huh?

maybe set up IM accounts on them and start a video chat type of thing.

How can I view security cameras connected to one pc in my home lan on my other pc's on my lan?nba playoffs 2007 ,nba teams

you will probably need some kind of router.
You can do this a number of ways. You didn't mention what operating system you were using so its kind of hard to give you more instruction on how to do this. But here is what you can do:

Use Remote Desktop (it comes with XP and Vista) so you can control your remote computers desktop. This works well with Vista and XP.

You can share out the Web Cams and connect directly to the Cams. Make sure you got the viewing software and drivers installed on the Computers that you are going to be viewing remotely from.

I hope this helps, good luck