Ok let start with Outfits first
1. Browse to your TE Folder/Script/Gamesys =>> Open Gamesys with your Notepad or any text editor
2. Type Ctrl-F, it will display the search bar. Type in the search bar: NbPreset
3. Below NbPreset you will see a lot of values like Face, Shirt, Short, Anims, Hat, etc.
4. Locate Shirt, change NbPreset to 1 and increase your last shirt one more value, if you add 2 or 100 shirts, then you have to increase NbPreset and shirt number with the same value
(for examples, your last shirt is 256 >>> change to 257
nbtype = 0 >>> change to 1
adding 2 more shirts: last shirt is 257 >>> 259
nbtype = 1 >>> nbtype 3
5. Close Gamesys and save it. Now go to your TE Folder/Data/Models/Texture/Male. Inside Male Folder you will see a lot of Faces, Shirts and Shorts. Look at your last shirt in the game. For examples your last shirt is 256, then rename the shirt which you downloaded to 257 and then rename other downloaded shirt to one more value if you want to add more
6. If you want to change the shirt style you can browse to your TE Folder/Data/Models/Texture/Male.Ini. Open Male.Ini with Notepad or any text editor. You will some kind of value like this: Tshirt01 1 2 5 Tshirt02 6 9 10 Tshirt03 3 4 8
Tshirt01 is normal shirt style
Tshirt02 is polo style
Tshirt03 is sleeveless style
If your shirt is Polo style, then just type 257 in Tshirt02: It will look like Tshirt02 6 9 10 257
6. If you want to add new Shoes, Socks, Cuffs, Hats, Rackets. You will see them in your TE Folder/Data/Models/Texture. To add new just do the same method above
To add new animations:
I find this frustrated at first but once you get used to it you will find it very easy
1. Open Gamesys. Find NbPreset, below you will find the section Anim. You will see your last anim for each strike section
For examples: Forehand 40
2H-Forehand 0
Backhand 15
2H-Backhand 29
Service 36
Slice 20
Return 30
These numbers 40, 0, 15, 29, 36, 20, 30 are the last anim in each strike section
2. Go to your TE Folder/Data/Models/Anim. Inside Anim folder you will see a lot of folders like playermale01 playermale02, etc
3. Ok now if you want to add a new forehand anim, examples above, last forehand anim is 40 =>>> create a new folder and rename it to playermale41 =>>> Then just put new forehand anim in there folder, you are set. If you want to add a new Backhand Slice, examples above, last backhand slice anim is 20, then just put your new backhand slice anim to playermale21. Do the same for other anims
4. And finally increase the number of anim you have added for strike in gamesys.ini
5. Now you can enjoy your new anim

Leave questions in this topic if you still confuse or still have trouble with this problem