(adsbygoogle = window.adsbygoogle || []).push({}); I've heard some things about BLES and BLUS patches.

What are BLES and BLUS files?
What do they do?
Do I need a modded PS3 to use them?
My PS3 uses BLUS30377, what does this mean?
(If I don't need a modded PS3 to use these files, how can I get them onto my PS3 and use them?)

Thanks for helping!