I dont know you're level of experience messing around with mods and such on Android, so just a heads up maybe you might want to try the suggested app above your post. That might be a easier and less risky solution...
I would read the posts I mentioned (either or both) to see if you want to embark on this journey. Once again, I would like to point out that this is not very hard but since I am not sure on your modding experience and I dont wont you to go into something blind. If you are unsure I can help as best as possible but if you're not comfortable with the idea of dealing with soft bricking your phone ,losing data or maybe having to restore from a .KDZ, than it might be better to look for an alternative.
Otherwise
to add recovery (a good idea anyway):
http://androidforums.com/metropcs-o...d-new-apk-version-08-27-14-a.html#post6661142
I always make a Nandroid backup to recover to my setup.If you have set up your SD card save it on there, if not you could save it on SDcard and put it on your PC.Or you could save it on your internal phone storage, and then onto the PC. My point being that if anything should go wrong (which is a possibility) you can restore the backup. Else it becomes complicated.)
Not sure, but if you need a way to boot into recovery search for rebooter on playstore.
I will leave it at this, just read everything before doing anything. All the info is there, the results are worth it!
**Please ask if unsure, I can help (some lol), but I want you to read and understand before diving in**