Ok - this is a long shot, but if you are not a member of sony's imagestation, try joining that. Then try to upload the picture. You can browse for it in whatever file it is installed to on your pc, when you go to upload. Once upload completes (cross your fingers and the toes on your left foot), then right click on the photo - there should then be an http: address in there. You can then click the IMG button above the post you are entering and insert the http: address. Course, that may be what you did to get the scanned photo in.......Just thinking that imagestation might recognize the photo and upload it even if your PC gives you a fit.
Also, dell had some REALLY cheap desktops the other day. Almost ordered one for DD but I figured she could use the old clunk and that $$ could go for Disney.