Also did you make sure NB wsn't holding you back?
!! No I didn't! But....I'm kind of afraid to up it because all I got is stock cooling on the NB and last time I upped the NB my kingston ValueRAM fried =/ but then again I was trying to OC that kingston past it's PC3200 speeds while currently I've got that same stick (RMA'd) underclocked, but do you think upping the NB would fry that 256 stick? Since I'm going to be giving that stick to a friend at christmas it'd really suck to fry it this close
EDIT: Also, I don't understand why tightening the cycle time to 6 which is faster than both are stocked at would help stability. I thought you mainly wanted to loosen those? I don't know enough about the actual effect of each timing on the system, especially when it comes to troubleshooting the memory errors....I'll definitely try what you suggested though before I try upping the NB cause like I said now I'm paranoid of it lol