Hm, it should be this: With small files, you can zip them and attach directly to a post. With larger ones, I would host them somewhere (drive, Dropbox, ...) and share the link.
Do you have Dropbox? If so, try putting the website in there. It allows for nested folders and such, just doesn't allow dynamic things like PHP. But flash and javascript are no problem and you can make some pretty complex things like. (try resizing and scrolling…
If you share a folder on dropbox any saves or updates to any files inside that folder with be updated for anyone that uses them. Also a program named tortoise SVN is alot like dropbox but intigrates directly with windows. Hope this helps
dropbox! Copy file to dropbox/public folder > Right click file > copy public link > Paste link. 2gb of free space, holds any kind of file, syncs between any PC, its pretty awesome.
I just noticed that I can't see a lot of these entries at work. To those using DropBox, realize that a lot of companies are moving towards blocking cloud sharing sites. Naturally, DropBox, being the most popular, is commonly blocked.