Cheats for PPSSPP?

[Ace Junior]

1. im using 0.9.1 of ppsspp which was downloaded on this site, i was wondering how to use cheats? i;ve read some post from the "cwcheat" thread but its not working for me , im using 64bit, do i need to download anything? and oh incase someone would be humble enough to teach a newbie here, i want to use cheats for GTA liberty city stories v3, china town wars, vice city. thanks in advance

2. i downloaded the latest version of build but i keep having a pop up error saying something about a missing .dll i google it and it says that it has something to do with directX so i downloaded it but still no luck

3. and oh rather than making another thread, how/where can i download the later version of ppsspp, (64 bit), i read through some post and i noticed that some games are working on the later version of ppsspp and not on the latest ones