Help: iWeb and image folder?

Prior to getting my Mac I used to have a pretty rubbish website with an unlinked "myimages" folder specifically to hold avatar pics, pics to link to in forum threads etc. I don't want these images to be included in my website.

Now I've switched to using iWeb for my website creation and Mobileme I can't work out how to create a folder within the space provided or how to upload to it. The iWeb experience seems entirely contained.

Anyone have any suggestions how i may be able to do this?

Thanks,

Mark.