You need to resize your pictures and that's easy to do.
Click
here to download Microsoft's free picture resizer.
Once the file downloads, double click it to install the program. Once installed, right click on the picture's icon or file name you want to resize. From the pop-up menu choose resize picture. From there, choose the small size and it'll do the work for you. (Go ahead and try -- that'll all make sense once you begin.)