Why is it so hard to get Pokemon White/Black to work on my DSTT?

Can somebody just make me a organized list of what to download.
All i want to do is play this one game.
I've tried downloading and patching and doing all that stuff it says and i still get error codes =/

might help if you state your firmware

get the latest ys menu and it should work perfectly the clean rom works 100% with both of my dstti's