Advice on Napping...

Ok,I'm turning to all you moms out there for some advice! Nate usually sleeps in the swing for his naps but I'm trying to transition him to sleep in his crib instead. He does fine in the crib at night, but during the day he pretty much prefers the swing. I've tried feeding him in the crib and even vaccum/play a CD of the vaccum going to try and get him to doze off to no avail (these help when he's in the swing). I play music, make the room as dark as I can...has anyone else been through this? I'd appreciate any advice that may have helped you! Doesn't matter how small, please leave a comment! Thanks!