You'll probably need to resize you pictures to load them. Use whatever imaging program you have. In the tool bar somewhere there should be something like "image size" "resizing images" "websize image" or maybe just "save to web" I usual resize these i images to 8" wide. Make sure it's sized at a resolution of 72 pixels/inch.
I only know PhotoShop. But, others here might be able to help you more if you let us know what imaging program you have.
Now if you're having problems figuring out how to use the loading program on here, this might help you.
[attachment deleted by admin]