Open folders on web sites

just curious if you could get much from these type of folders, i know of the images folder what other filenames can you get up?

Depends on the web server that's running. Use the Server Spy extension in Firefox and do a quick Google search for the default folders of that web server software.

Theres loads of diffrent files which could store useful info, There is a folder which MS Frontpage makes if the site was made in frontpage and sometimes this holds some valuable information.

I also found some sites use robots.txt so search engines don't find the folders but do not make the folders secure so you could find some useful information that way.

Hope this is of help.