Most imaging programs can manipulate photos to easily resize them.
WolfpackFan, in addition to resizing the images, has also uploaded them to his own site so he can link to them. If you are using images from vascubaguy's site you have no way to resize and link to them unless he resizes the images and allows it.
There are a number of free photo sites, including the
DIS's Photopost, where images can be stored and then linked.