Mapping S4 for cleaner access to decks C and D

First thing:
the embedded mapping is the 'default' one, can be changed to an extend but hasn't been made to be customised.
So you need to erase it first.
Then using in the controller manager, under 'device' (top half), use the add button, in the scroll down menu click on import, you'll go to the traktor version's file you're using, navigate to settings/default settings/controller/native instruments and click on the s4 user mapping to bring it into your controller manager.
Now just that is clear: the default user mapping, you've just brought isn't the embedded one. It's a simple reflection of the more complex embedded one (that cant' be recreated fully with a user one, you'll loose the copy mode, a lot of led feedback, a lot of functions, the loop size display, etc, etc...).
Inside that user mapping, erase the modifiers 1&2. Those are the modifiers that do change the user deck layers (a&c, b&d). Now erase all functions that are assigned to deck c&d, all but the mixer control (eq and the like, fx assigments, etc, etc.. well, you get my point and use a bit of reflexion here).
In all remaining functions remove the modifier conditions 1 & 2 you find.
As you erase the modifiers 1&2, you removed the ability to change deck layers and that mapping. Create two new commands to load on deck C & D on those deck layers buttons. Remember, but you need to check the user mapping may have when using shift+those buttons to change deck layouts (you may need it to remove that, add it, I don't knwo what you want to do).
Find all commands associated to the sample buttons 1to4, erase them and create your nex fucntions (you said hotcues 1to4 for either decks c&d, add also the possibility to use shift - the modifier is already created, check which one it is for eack deck - to delete those hotcues.
Do the same for the loop in and loop out buttons right and left sides.
And I believe you should probably be done at this point (I didn't study the default user mapping for quite a long time and may be missing some details and the functions integrated inside but the above is basically what you wanna do and counting on your proper analysis I'm sure you'll find the way).


Now a very simple alternative suggestion if you have an iphone and that won't cost you much:
download touch osc, osc bridge, create a template to have basic controls on decks c&d.
Just an example here, I created to very simple template to have control on one sample deck that allows me to not being obliged to switch layers (from 4:52 in the video):



Cost: a bit of time and what? a few euros for touch osc.
You can create a very simple template even on an iphone to control decks c&d with even a bit more control (loops, etc...). The limit here being the size of the surface and your mapping abilities.

First thing:
the embedded mapping is the 'default' one, can be changed to an extend but hasn't been made to be customised.
So you need to erase it first.
Then using in the controller manager, under 'device' (top half), use the add button, in the scroll down menu click on import, you'll go to the traktor version's file you're using, navigate to settings/default settings/controller/native instruments and click on the s4 user mapping to bring it into your controller manager.
Now just that is clear: the default user mapping, you've just brought isn't the embedded one. It's a simple reflection of the more complex embedded one (that cant' be recreated fully with a user one, you'll loose the copy mode, a lot of led feedback, a lot of functions, the loop size display, etc, etc...).
Inside that user mapping, erase the modifiers 1&2. Those are the modifiers that do change the user deck layers (a&c, b&d). Now erase all functions that are assigned to deck c&d, all but the mixer control (eq and the like, fx assigments, etc, etc.. well, you get my point and use a bit of reflexion here).
In all remaining functions remove the modifier conditions 1 & 2 you find.
As you erase the modifiers 1&2, you removed the ability to change deck layers and that mapping. Create two new commands to load on deck C & D on those deck layers buttons. Remember, but you need to check the user mapping may have when using shift+those buttons to change deck layouts (you may need it to remove that, add it, I don't knwo what you want to do).
Find all commands associated to the sample buttons 1to4, erase them and create your nex fucntions (you said hotcues 1to4 for either decks c&d, add also the possibility to use shift - the modifier is already created, check which one it is for eack deck - to delete those hotcues.
Do the same for the loop in and loop out buttons right and left sides.
And I believe you should probably be done at this point (I didn't study the default user mapping for quite a long time and may be missing some details and the functions integrated inside but the above is basically what you wanna do and counting on your proper analysis I'm sure you'll find the way).


Now a very simple alternative suggestion if you have an iphone and that won't cost you much:
download touch osc, osc bridge, create a template to have basic controls on decks c&d.
Just an example here, I created to very simple template to have control on one sample deck that allows me to not being obliged to switch layers (from 4:52 in the video):



Cost: a bit of time and what? a few euros for touch osc.
You can create a very simple template even on an iphone to control decks c&d with even a bit more control (loops, etc...). The limit here being the size of the surface and your mapping abilities.