Download the utility and open your DSDT with it.
Now click IASL, if you are lucky (which you are not
) the dsdt wil compile. In your case i get: see attachment.
This means you need to fix the errors and warnings. Some i know how to fix, others i just type in google. (Working on it right now, so you don't need to, but you can learn something from it)
When the errors and warnings are gone, you can start applying patches. The most common come with the utility, click on patch, open, and navigate to the DSDT folder, there is a folder with patches you can apply, i don't know which ones you need, still have to look in too it
After you have applied the patches, you click compile, if an error comes up, fix it, by clicking on the error, the program will go to that line.
If it compiles, put the DSDT.aml in /Extra folder. (An error can always occur, also a not bootable system.)
Edit: The screen is already without errors
You had 3 of them, click on fix errors and they will be gone.
Edit 2: Did not read correctly, a DSDT file makes it possible to get your installation as vanilla as possible, it will inject information into OSX to load genuine Apple drivers, instead of replacements downloaded from the web. Think of speedstep, sleep, audio, video, ethernet, etc..