you can right click and choose to delete them. Are they all the same printer being added?
Your networking issue can be something as simple as an over aggressive firewall. But in the instance of an upgrade install of XP, I always have the feeling that some anomaly is left over from the previous install and is causing problems. A clean install of XP is always preferable.>>>>
http://michaelstevenstech.com/cleanxpinstall.html
Host on an XP machine - clients are 98SE machines. Just upgraded from ME to XP on the host machine and boy is this networking a problem. My clients can share with each other and my host can share with the clients but my clients can't get anything from the host and everything I can set up is set to share. I'll keep working on this -- but, just about every time I run the client setup disk on the client machines, when I go into Network Neighborhood to look at that machine it has added more printer icons. One of the clients is up to 52 printers. How can I remove these printers? All the shared files are ok, it is just the printers that keep "growing." I don't even have printers on the client machines.

Chowhound
Comic Vine
GameFAQs
GameSpot
Giant Bomb
TechRepublic