Well, they're not giant unless you click on them, so don't click on them.
I don't know if this will help or not, but I did a search in Windows Help and found this--
Many common picture editing programs allow you to change the quality level of a JPEG picture when it is saved. When using the program, look in the program's Save As dialog box for an option to change the compression or quality level. The lower the quality (or higher the compression), the smaller the file will be when it is saved.