Download both files and in stall the APK don't open the app click done then the second file extract the contents in to internal storage/android/OBB/(place in here the folder called com.aspry.swkotor folder which will be located inside the folder you just placed in the odd location might sound abit confusing but when extraction is done this folder is inside the folder that you have just extracted from the zip or rar file you download so it is as simple as just moving the contained folder in to the obb)