Will,
If you print your photo on a larger photo paper you would get the whole print.
You would then have to do your own cutting around the photo to get the borderless print.
Digital cameras almost all take images in the 4:3 ration. some do allow you a choice like 2:3 for 4x6 prints. If you only take digital images then you would have to crop the image yourself before printing to a 4x6 paper because the ratio size is different unless you have a newer camera that gives you the 2:3 choice.
If you scanned images from a 35 mm camera or got a CD of images from a photo processing store of your 35mm images then no cropping is needed as they are the correct ratio to print 4x6 prints.
On the same line, a lot of online photo album/print sites now give you the option of getting 4:3 ratio prints from your digital camera which means there is no cropping done to your image. The entire image is printed.
When you shoot your image just make sure that you don't have anything important on the edge of your view. This is kind of hard to explain, but always get more in your view than what you need so you don't have to crop off anything important to get your 4x6 print.
If you shoot at a lower pixel number it would not change the ratio.
Lori 
