Step one download NO$gba and and the rom you want. for example snk card fighter download renegade 64. get a list of cheat codes. for example action replay codes, i would go here to code http://www.codejunkies.com/ run no$gba and load up the rom and make sure it is running. then start renegade 64. click on cheating (tap on top next to file), then click on attach to emulator, and select no$gba and select trainer/patcher (action replay codes count as a trainer) First on the top right hand side it will say Training Options, it will has a box labeled system, click on NDS as shown in picture above You then type in the name of the cht file you want to create (same as on vba) in the example i typed in snk, for snk card fighter on the left hand side on the bottom, and i click on add, it then makes a file for snk i then go to code junkies and look up codes i then type in the name of the codes i want to use in the example i am using the cp code. i then copy and paste the code directly from code junkies into the box where it says codes you can make notes on the cheat codes if you want but i left it blank (this is for buttom combinations etc...., like pressing up and select to activate somthing) you then click on set as new on the bottom right hand side. you have just entered in cheat codes, but to add them to the no$gba program you will need to turn them on, in the top right hand to the training options, click on activate codes, in the picture above it is turned on and the picture above says deactivate codes, if you wish to turn the codes off simply click on that toggle. if you have done it right the codes should work. example. (screenshot of snk on no$gba with max cp) there see it works.