You can download the original BLUS31028 PARAM.SFO & EBOOT then just copy & overwrite. in case you didn't find the BLUS eboot you can install the BLUS DLC & keep your BLES game, How? ok once you install the BLUS DLC, go to Multimans file manager (START+SELECT to get to file manager) once you get there enter PS3 root/dev_hdd0/game,now find the BLUS31028 folder in this directory. copy the USERDIR folder to BLES01713 & voila.
where to find Original EBOOTS? here: http://www.ps3news.com/forums/ps3-cf...ry-124746.html
i am so sorry for this late reply, cause i'm not the same since my car accident a roll over car crash & i hope i'll get better with time
have a nice day.