Building a custom drum kit

Yesterday I was able to import a number of drum sounds from a folder on my CR card. I used the mark set and import function. Once imported, i selected them all again and loaded them to the keyboard (I like keys better than pads). I was able to record some sequences, etc. Fine. I tried to save those sounds as a rhythm and (now i am going from memory) I chose the user area. My thought was i could save to user area this and a few kits so they autoload and i can save a step since i am tired of the stock drums. However, i turned off the machine to test this and although it shows my kit a rhythm in the patch list when i select it, it does not appear to have loaded the samples. I obvious am struggling with understanding how to set this up.

What is the cleanest way to set up a few drum kits to be ready when i boot my x6?