I tried one more set of CRT ranges that Monkeyjug came up with in an older posting, now it chooses 432x256 and fixed the blue screen issue.

I can also force 256x240 now, and it no longer cuts out , although the 432x256 is much better, I'm hoping I can stick with the following and get on to some final adjusting before moving onto to Mala for noobs.
http://forum.arcadecontrols.com/index.php/topic,132277.msg1359174.html#msg1359174crt_range0 15250-18000, 49-61, 2.187, 4.688, 6.719, 0.190, 0.191, 1.018, 0, 0, 224, 288, 448, 576
crt_range1 20000-21500, 40-80, 2.910, 3.000, 4.440, 0.451, 0.164, 1.048, 0, 0, 320, 360, 0, 0
crt_range2 23900-24420, 49-61, 2.910, 3.000, 4.440, 0.451, 0.164, 1.048, 0, 0, 384, 400, 0, 0
crt_range3 29000-32000, 49-61, 0.636, 3.813, 1.906, 0.318, 0.064, 1.048, 0, 0, 448, 512, 0, 0
crt_range4 37000-38000, 49-61, 1.000, 3.200, 2.200, 0.020, 0.106, 0.607, 0, 0, 512, 600, 0, 0