Question about Cricut

Hey everyone out there in blogger land! I have a question! I have a cricut, just a small one, but I want to be able to use cutting files from other places. Can someone tell me how this can be done? I've heard of "Sure-Cuts-A-Lot" but according to their website, they do not support Cricut machines. What does this mean? Can I still use SCAL with my cricut or can I not use it? HELP! I want to do so much more with my Cricut and I don't want my husband to think he made a mistake in purchasing it because I'm so limited on what I  can do with it! Thanks for any and all comments/help you can give me!
Have a wonderful week-end!
Blessings!
~H