Crunchyroll Video With Subtile

I need a software or a script which lets me download crunchyroll video with subtitle..it can be downloaded separately but you gotta tell me how to merge them together I don't know how the the script or software may work so you have to tell me with details too so I can understand the way to download them pretty well..Also I'm gonna use crunchyroll premium account for this[thats just the details if you are making some script] I searched a lot about this but I have no idea how to get it...the file of flash videos are named as .swf but I think they are actully rtmp ones,the subtitle are xml files...