INTRODUCTION

The fabulous Courier Shows Delivery mod makes the courier to show contents of his deliveries. But not of all of them that is if use USLEEP. USLEEP fixes him to give you the letters, but the underhanded courier still successfully sneaks them into your inventory without displaying, including:
the letter from The True High King Falk Firebeard in The Wolf Queen quest,
pamphlet about Dawnstar Museum,
Thank-You letter from your victim's rich enemy,
steward's letter on adoption,
dwarven-fanboy Calcelmo's desire to own your dwarven items,
a secret friend's letter about possible source of power for the Dragonborn,
Quintus Navale's letter about White Phial.


NOTES

If you won't take a letter it will still be sneaked into your inventory by a courier.
If you store any items into the temporary storage and close it, the courier will claim the rightful ownership on them.


INSTALLATION

There are two available options for installation: ESP and scripts or just scripts only - choose only one, I'd recommend the first one. If you use mod-manager, then you install this mod as any other, if you install your mods manually, then put this mod's Scripts folder into your Skyrim Data folder and If you've chosen to install the first option you have to also activate it's esp, esp load order should be after Courier Shows Delivery esp and USLEEP esp.
Why even have a choice, you may wonder. The answer is simple - I thought firstly that the option without esp will make things easier, but it seems it only complicates them. How - explained further.


UNDER THE HOOD

Courier Shows Delivery changes WICourier Quest and it's WICourierScript, but not all letter-givings of USLEEP function through it. The aforementioned letters were given to the player through their own TopicInfo scripts. I changed this scripts to use the temporary storage provided by Courier Shows Delivery to display them.

So this mod will most likely not function if you merged the Courier Shows Delivery mod with other mods or changed it's structure. If you already merged Courier Shows Delivery into your big bad merged esp and don't want to bother unmerging it, then you can try to make this mod compatible by doing some legwork yourself.

If you downloaded the first option with esp - then open your big bad merged esp and this mod esp in TES5Edit and edit every record (there are as of now only seven dialogue response [INFO] records there) of this mod in the next way:
each record has a Virtual Machine Adapter group, there are scripts and their properties - find in each record property named MediumContainer and edit it's value's Form ID so that it will point to the reference id of CourierStorage from Courier Shows Delivery mod, I mean placed object into the CFCel.

If you downloaded the second option without esp - in there to get access to the temporary container created by Courier Shows Delivery mod, I use it's reference id from CourierShowsDelivery.esp. So if you merged Courier Shows Delivery mod's esp into your big bad merged esp then my scripts will be lost and you'll be left without your letter. To point the scripts to the right place, you need to open your big bad merged esp and find CourierStorage - the object placed in CFCell, created by Courier Shows Delivery mod, then open each of the script sources from this mod and change in code:

ObjectReference MediumContainer = Game.GetFormFromFile( \
0x0D71, \
"CourierShowsDelivery.esp" \
) as ObjectReference

CourierShowsDelivery.esp to the name of your big bad merged esp, 0D71 to the REFR ID of CourierStorage placed in CFCell (without the load-order prefix). And compile them by any means: through command-line papyrus compiler or through any other tool. I'd recommend Papyrus Compiler App, it's fresh. Please direct any questions on script compiling into emmm, ummm not here. Try searching forums, the answer is probably there already.

So as you see, the first option is simpler.