Not overclocking at all actually. Only running the method you showed.
It ended up sorting itself. I suspect that it had something to do with graphics acceleration. I played a video in Quicktime and it seemed to fix it. Hasn't happened for about an hour now (vs before where it was obvious screen errors). Like currently, I'm typing and the screen isn't flickering black anymore!
Also, I took your advice on the terminal BIOS fix and you were right, you have to set a password otherwise it doesn't work (hitting enter doesn't let you in if you have no password set). Computer works PERFECTLY. I'm up and running 100%! I'm out of SATA ports so I gotta go buy a PCI-E SATA card so I can plug in my E-SATA drive (I see in Multibeast that there is some form of support for it). I video DJ and need the external support with a fast interface (like firewire or E-SATA) so I can import the gigs and gigs of music I get from my music services every week!
This guide is amazing, and memmerson I cannot thank you enough for your dedication to this thread and in helping me solve the issues I have encountered! If anything else arises, I'll post but so far it's running great!
djbuddha