Decorating a 3 season room?

I want to redo my 3 season room. Right now its used for pretty much storage, but I want to make it into a nice sitting area but don't want to spend a whole a lot of money. Its long, there is a freezer in it that needs to stay in it cause there is no other place for it and its at the beginning of my house so its some what of a porch also. I was thinking of putting the freezer at one end of the room and seperating the room with curtains instead of a room divider because they get pricey but dont know if it will look bad and also what color would be a good relaxing color to paint the walls. there is also brown carpet the kind that yhou would put in a porch if you would put carpet. if any ideas please let me know cause i serouisly need help. If you need pics of the room let me know and I will e-mail you some pics. Please someone help me I am a good designer but this room I am clueless on.