The FCKEditor for the forge wiki has a built-in "Insert/Edit Image" function. When "Insert/Edit Image" is selected, you have the choice to embed and pre-fetch links from a URL or to upload an image.

Documents can be uploaded or referenced in three different ways:

1. Upload the file using the Docs deature and embed a url/link in the wikipage
2. Create an association to a existing file using the Association tab at the bottom of the page
3. Using the Files tab at the bottom of the wiki page