First, you need the wap id from the gallery. How to get the wap id? navigate to the file that you want in the gallery, then click on it. You can see the wap id right at the bottom. Remember the number.
Then goto http://wap.mobile9.com/
Depending on your phone, you'll have to choose between the WML option (older phones) or the XHTML option (newer phones). Then enter the wap id you got from the gallery and click ok. For the WML option, you need to enter the wap id, then click on your browser's option menu.
If the above address is not working, the direct link:
WML option: http://www.mobile9.com/wap/gallery/
XHTML option: http://www.mobile9.com/wap/t610/