Converting size/time measurements?

[Len23]

I received a tiny (1.5) crockpot for xmas and decided to break down and exchage it for a 3.5, which is what i really wanted. But...the schmancy 6L/Quart with all the bells and whistles (stainless, timer, oval, matches the kitchen ) was on sale for the same price as the 3.5 so we gave in and went with the bigger one. Thing is, it's just the two of us at the moment. A lot of the recipes I have call for a 3.5 or 5L sized pot, though some also call for a 6. Short of having three different pots, is there a way to make my new 6L one do double duty? Can I cook these smaller recipes in a larger pot? Do I have to double the recipe, change the cooking time?
If a recipe on zaar doesn't specify the size of pot (I noticed that lots don't) what should I assume is the proper size, or does it matter?

I just put on my first batch of crockpot applesauce because I figured that was hard to screw up- we'll see how the new pot does .

[Chef #205559]

Len, you can go to http://allrecipes.com/ and find the recipe you want to use in your slow-cooker and at the bottom of the recipe you can change the size of the recipe to how many people you want to serve. Hope this will help.