the full step by step was in the 6/65 book.

to compile any set of pads from any other sets of pad files you use the custom section. Say you have 3 sets of pad files each loading as one bank A, you want arranged as 3 banks, this is not possible using the conventional menus with no single pad load option. But it is possible with a little lateral thinking:

load pad set 3
in composer menu, custom style copy, copy bank A to custom 3

load pad set 2
in composer menu, custom style copy, copy bank A to custom 2

load pad set 1
in composer menu, custom style copy, reverse the direction arrow and copy custom 2 to bank B, then copy custom 3 to bank C.

if you look at your pad banks you now have all 3 banks simultaneously filled with your choices, and can save and load all the new pads in one go.

this is not limited to banks either. Since you have phrase copy menu in the performance pads menu you can copy any single pad from any position in any bank to any other position. Thus while loading new pad banks, and bringing back previous pad banks from the custom section, you can arrange your individual pads in any bank position you like before sending them back to the custom section, then bring back each bank in turn with individual pads in whichever position you like, thus mixing pads not only from different loads but also from different banks. Bear in mind the difference between normal pads and solo pads. You are not at all limited to the arrangement preset in any bank load.

Alec