Right click on the picture and rename it. You'll get it.

I upload my pictures first with GOOGLE Picasa and then use the box on the right of the tool bar above. If you have a google email account Picasa is FREE and if you don't have google email, I just created a free email account and I have it forwarded to my hotmail.
First go here--> http://www.google.com/ Then use the drop down at the top right marked MORE
Click on PHOTOS and create an account. The thing to remember with Picasa is that...

1st: you have a library in your computer that you import photos from your scanner or camera. (top left in picasa)

2nd: you process the photos, twist, crop, name, type on etc.

3rd: you upload the photos to the internet to your "on line" Picasa files. Then right click on the picture -> properties -> copy -> then paste between the brackets produced when you click the box to the right on the tool bar here above.

Another nice thing about Picasa is that you can send or post a link to your on line pix like this--> http://picasaweb.google.com/TucsonSmitty/EveningStarVariations?authkey=Gv1sRgCMP3wZPb4Z_KIg#

It sounds complicated but it is really not that hard once you learn how to navigate Picasa.
Just remember... IMPORT -> PROCESS -> UPLOAD and you got it!