To utilize these files:
1. Customize each one to your liking (the files are all 2048x1024)
2. Using a text editor (I recommend Notepad++), open the included TexMod.log, and replace C:\Program Files (x86)\Steam\steamapps\common\Borderlands 2\Binaries\Win32\Out with wherever the files are located on your PC
(the above can be done easily by using the "Find and replace" feature in Notepad++)
3. Open TexMod, click the "Package Build" tab, then select the definition file (that's the TexMod.log file you just edited)
4. Click build, wait a few minutes, then name your .tpf file and remember where you saved it.
5. In case you haven't used TexMod before, click the folder under "Target Application" at the top, and select your Borderlands 2.exe (which is probably in Steam\steamapps\common\Borderlands 2\Binaries\Win32)
6. Now go over to the "Package Mode" tab, hit the folder above the red X, then select the .tpf file you created.
7. Finally, hit "Run" at the bottom, and you should be good to go!

====If you make a mod using these resources, please credit me (cbgreely) and let me know in the comments of this file's page, as there aren't any loading screen replacers for BL2 as of this being published.====

In case you want to make loading screens custom for each area:

If you sort the images by alphabetical order (as the should be already), the order is as follows:

Badass Crater Bar
Pyro Pete's Bar
Tundra Express
Magnys Lighthouse
Windshear Waste
Hero's Pass
The Beatdown
Torgue Arena
Highlands Outwash
Murderlin's Temple
Natural Selection Annex
Candlerakk's Crag
Vault of the Warrior
Arid Nexus Badlands
The Holy Spirits
Bloodshot Ramparts
The Winged Storm
The Dust
The Rustyard
Marcus's Mercenary Shop
Sanctuary (Flying)
Hallowed Hollow
The Leviathan's Lair
Lynchwood
Frostburn Canyon
Immortal Woods
Fink's Slaughterhouse
Three Horns Divide
Southern Raceway
Gluttony Gulch
The Bunker
Three Horns Valley
The Raid on Digistruct Peak
Oasis
Wurmwater
The Fridge
Sawtooth Sauldron
Wildlife Exploitation Preserve
Terminus
Caustic Caverns
Southern Shelf
Hunter's Grotto
The Highlands
Southpaw Steam & Power
Dragon Keep
The Forst
Sanctuary Hole
Terramorphous Peak
Ore Chasm
Washburne Refinery
Thousand Cuts
Oppurtunity
Friendship Gulag
Scylla's Grove
Eridium Blight
Hayter's Folly
Southern Shelf Bay
Hatred's Shadow
Ardorton Station
Rotgut Distillery
Borderlands 2 (The logo loading screen when you quit the game)
Control Core Angel
End of the Line
Lair of Infinite Agony
Mines of Avarice
Arid Nexus Boneyard
Unassuming Docks of Potentially Little Importance
Flamerock Refuge
Wam Bam Island
Bloodshot Stronghold
Sanctuary (Grounded)
The Forge
Badass Crater of Badassitude