Question : How do I setup a shared folder?

I am currently using a wireless router to provide access to the internet for three desktop computers and one laptop. The desktops are operating under Windows XP and the laptop is under Windows Vista Ultimate. I am going to be working on some school work and I need to have access to files that I create from each of these computers so I would like to have a shared folder. How do I set that up?

Answer : How do I setup a shared folder?

Here are some helpful links:

How to set up a shared folder on XP:
http://www.wellesley.edu/Computing/FileSharing/Windows/facstaffxp.html

How to set up a shared folder on Vista:
http://www.windowsnetworking.com/articles_tutorials/File-Print-Sharing-Windows-Vista.html

A video:
http://www.wonderhowto.com/how-to/video/how-to-share-files-with-microsoft-windows-vista-262321/

Video about sharing files between XP & Vista:
http://video.google.com/videoplay?docid=4229312501849834214

Tell me how far did you go :)