Playing videos without converting...Possible?

So I've had success in using Redkawa to convert various movies and video files on my computer so that I can play them on my PS3. The process tends to be pretty annoying though, my computer is not that fast and it can take like an hour to convert a full length movie , occasionally even getting an error after I transfer it and having to start over again. I am wondering if anyone knows of a way to get the PS3 to accept and play more video types so that I can skip the conversion process altogether. Whether its as simple as installing some codecs or whatever (I'm relatively savy and could follow simple directions without a problem). Any help is greatly appreciated!!

---I will pre-lol myself because I'm sure this has been asked on the board before, so no sarcasm is necessary =)

thanks again guys!