I'm sorry if this topic has been covered before but I couldn't find it by search or from the last few pages...

What I want to know is how could it be possible to lay all the samples from banks C-J to a keyboard's keys? Or how could I change the setting of what key triggers which sample? when I tried it the notes were just in a really unlogical order on the keys and couldn't be played in any good way.

Then notes are spread across keys, but they are spread across multiple channels.. check the manual about which channel+note corresponds to which pad.. If your keyboard supports splitting the key section and transposing the splits and setting their channel you might be able to do it.