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Hello , Today I will show you how to add codes for cheat engine 5.4 and 5.5 on the newly released SFIV for now in this guide , I will show how to unlock SETH before unlocking the others 
Update: http://www.youtube.com/watch?v=mWAh-SPlotQ
When you have SFIV up and running , open Cheat engine
Now click on the glowing icon upper left to select which process to cheat (in this case, Streetfighteriv.exe)
Once that done, click on add address manually button
Replace the address with the address code in the list which i will show next
Leave the type to 4 Bytes and leave the pointer unchecked
After entering the code change the 0 value to 1 to unlock what u want
I’ll start out with the character modifier numbers …
02E34714 ( This code only seems to freeze up the game )
00990FD4
00A453B8 ( This is like a move set movements modifier and throw changes . Sometimes this is a character modifier rather than move set , so its pretty much a coinflip . )
00A458F0
00 = Ryu
01 = Ken
02 = Chun-Li
03 = E.Honda
04 = Blanka
05 = Zangief
06 = Guile
07 = Dhalsim
08 = Boxer
09 = Claw
10 = Sagat
11 = Dictator
12 = Viper
13 = Rufus
14 = El Fuerte
15 = Abel
16 = Seth
17 = Akuma/Gouki
18 = Gouken
19 = ( Blank : Possibly a removed Dee Jay or T.Hawk )
20 = Cammy
21 = Fei Long
22 = ( Blank : Possibly a removed Dee Jay or T.Hawk )
23 = Sakura
24 = Rose
25 = Gen
26 = Dan
27 = Random
Below are the better cheats that have its uses !
Here is the cheats to unlock characters . I don’t know if the addresses will work on your computers though 
…
These are the values
00 = Locked
01 = Unlocked
These are the addresses
-Unlock Characters
00A4BB38 = Cammy
00A4BB3C = Fei-Long
00A4BB40 = Sakura
00A4BB44 = Rose
00A4BB48 = Gen
00A4BB4C = Dan
00A4BB50 = Akuma
00A4BB54 = Gouken
00A4BB58 = Seth
-Unlock Colors
00A4BB5C = Color 3
00A4BB60 = Color 4
00A4BB64 = Color 5
00A4BB68 = Color 6
00A4BB6C = Color 7
00A4BB70 = Color 8
00A4BB74 = Color 9
00A4BB78 = Color 10
-Unlock Taunts
00A4BB7C = Personal Action 2
00A4BB80 = Personal Action 3
00A4BB84 = Personal Action 4
00A4BB88 = Personal Action 5
00A4BB8C = Personal Action 6
00A4BB90 = Personal Action 7
00A4BB94 = Personal Action 8
00A4BB98 = Personal Action 9
00A4BB9C = Personal Action 10
-Unlock Voice Acting Per Character
00A4BBA0 = Voice Acting Per Character
-Now Loading animation doesn’t show up
00A44164
Value = 0 ( 1 will stay on the loading screen 
)
UPDATE : Ok guys I found something where it unlocks Sakura , so I may be able to get others with this as well . My address I get is 00A4BB40 . Locked is 00 , unlocked is 01 .
-Unlock Voice Acting Per Character
00A4BBA0 Value = 01
-Now Loading animation doesn’t show up
00A44164
Value = 0 ( 1 will stay on the loading screen )
I hope that help , and plz if any one know a way to use 2 keyboard to play as 2 players for SFIV pc versionor play it network as LAN connection plz help me