End result:
You will need:
CK2 AIW CE Tables
Cheat Engine (
http://****************/download/CheatEngine561.exe,
Cheat Engine)
First, download the two things you'll need & install.
Put the .ct file on desktop next to cheat engine link for ease to do this hack.
Next, run the CK_'s Mw2 v1.3.37 Cheat Engine Table.CT file.
You should have
this if done successfully:
Run mw2 (windowed).
Press play.
Go back to the cheat engine window.
Push this button:

Choose where it says iw4mp.
DAT and click open.

Click yes in the dialog to keep the current codes.
Congrats, now you can edit anything you want.
Doubleclick on any 1_ address value, and change to anything you want.
Lets say, you want 10th prestige.
You doubleclick the value column right to 1_Stats_Prestige
Write in 10, click ok.
Now click the checkbox left to description.
Vuala, you are 10th prestige!
Edit xp to this: 2516000 if you want 70 level.
If you want to unlock everything select Akimbo_MP5k and hold shift.
Go to bottom and select everything like this.

Double click -> change record -> value
Put in 43, click ok.
Then click on any checkbox and vuala - you unlocked everything!
Also you can edit stats just like I said before
I wanted to make this as clear as possible, if you have questions - ask!

As I posted this, it works. Please quote this and spam to as many forums as you can, to spread this, bcz everyone is looking for level hack

thx, just remember to thank me
Cheatengine virus scans:
VirusTotal - Free Online Virus, Malware and URL Scanner
CheatEngine561.exe - Jotti's malware scan
CK CE Table virus scans:
VirusTotal - Free Online Virus, Malware and URL Scanner
CK_'s Mw2 v1.3.37 Cheat Engine Table.CT.zip - Jotti's malware scan
Sorry, as this is my first contribution to mpgh.

This works, and I didn't find any working level hack. Only EAM, but if you use it, stats get reset after you restart your mw2. This is permanent. If you don't believe it, i think i'm gonna make a vid
Thanks to:
CK2 for Cheat Engine addresses
Me for writing this guide
Maxdamage

or whatever that ******s name is for shitty server