I am hearing this is about 5-6 hours even scouring everything? Sound about right? I also was curious if Shattered memories was around there as well.. I am getting pretty varied responses =)

The game is about 2 to 2 1/2 hours long if you have a decent idea of what your supposed to do. But if not, it can last for about 5 or 6 hours, yeah.
Shattered Memories is pretty much the same way, but a bit shorter.

Thanks for the great responses. I started this one on my PSP a long while back and did the parts with the organs, not even sure if I had gotten to the boss. Now I'm not sure if I should start over completely to refresh myself, or just continue.. =)

No problem. And your at the beginning of the game still, so I wouldn't see the problem in starting over.
But, I think this topic and the one you made in the SH3 section belong in the "Daddy...Help me!" section. I'm not sure how the mods look at making a topic just to ask about the length of a givin game though, even in the Daddy help me section.