@gwany1999 - Silhouette does have a basic calibration tutorial on their website @mrspotts @jenn mccabe might have some other ideas for you but this was posted recently in the hybrid pad for more serious calibration issues http://catscrapfever.blogspot.ca/2012/10/how-to-compensate-for-silhouette-print.html
I started by just following the directions on their website. But got a little confused when my print out didn't have those green boxes (they are not sup'd to print) - so I just went to YouTube and tried a few videos until I found one A) not annoying B) quick and C) for the portrait. I didn't bookmark it though. I would just search "cameo calibration" in YouTube and try to find one that is based on your model Cameo. There are quite a few! Good luck.