do my ram timings look ok on 1.5gb ram http://img2.pict.com/e7/05/72/3438038/0/16102009060143.png http://img2.pict.com/ce/96/b7/3438039/0/16102009060159.png http://img2.pict.com/4c/3f/dd/3438040/0/16102009060215.png please reply
why do you ask? are you concerned about anything? From what I know, all the other modules will be working in par with the slowest one.
as edijs says the memory controller will set the frequency to the slowest memory module installed in your case 266mhz. but judging from your 800mhz ram the timings are spot on for 800mhz ram 4 -4 -4 -12 can't get much better than that. your best to invest in a proper dual channel kit.