i found on the internet a speedhack that is working its called: Cheat Engine 6.0 it only works for co op missions. this is the link to the site of cheat engine:
or go here 
click the big green button and dowload cheat engine
Run it as admin and then you see this:

click on the little computer in the left top corner.
then you see this:

click on "window list" and you'll see this:

click on the selected process (Aliance Of Valiant Arms) and click on open
then you'll see this:

check the box with "enable speedhack" and you can adjust the speed to whatever you want it (for co-op i recommand 1.8 when play with friends but 1.3 when play with randoms) ALWAYS PRESS ON APPLY WHEN YOU CHANGE IT OR ELSE IT WON'T WORK
CONFIRMED WORKING ON:
windows 7 64bit
Windows vista ??bit
credits to:
Cheat engine.org
ps. I am not responsable for you getting banned. and press thanks if i helped
Video (only from how it works because I cant use fraps and speedhack at same time T.T)






