What exatly is the problem?
I know that imageshack is a pain sometimes, but mostly it works well.
Just make sure that you save your images in a file type that is readable by browsers, such as .jpg, .gif, .png or .tif. Then make sure it is smaller than 1024 kb, which is mostly the case unless your image is kick ass huge.
Then you go to http://www.imageshack.us
, search for imagefile on your harddisk and click upload. After a short uploading time it offers you different links.
I prefer the thumbnails of type 1 for PEEL. The ones that go like [URL=http://***][IMG]http://***[/IMG][/url]