Ok. I can give you a hand with Powerstrip. I don't think that you are running the right resolutions. I really need to write a FAQ for this, maybe this will be the beggining of it. Here are a couple of things that you need to understand.
The -Resolution tag in MAME will display at whatever resolution you indicated AS LONG as that resolution is loaded in your display driver for Windows. I haven't touched DOS or AdvMAME in ages so everything that I will tell you has to do with Windows XP.
So for example. Here is what I do to add a resolution in Powerstrip.
First, turn off your PC and reboot it with no monitor plugged in. This will ensure that we are working on the Default Monitor display driver, which will be the one that the Arcade monitor boots up in.
Now, make sure that you have the latest version of powerstrip, and run it. I would suggest starting from scratch, so uninstall Pstrip if you had it before and reinstall it. Now exit powerstrip and go to the folder where you installed it and open the pstrip.ini file.
Under the General Settings (Or something like this) heading, you have to add the line:
minlines=200
And also, add this under the custom resolutions heading if it exists, or just paste it with the header on there at the end if it does not exist.:
[Custom Resolutions]
240x224=240,8,40,16,224,4,3,31,4779,7
240x240=240,8,40,16,240,4,3,15,4779,7
256x224=256,8,40,16,224,4,3,31,5030,7
256x240=256,8,40,16,240,4,3,15,5030,7
256x256=256,8,40,16,256,3,2,1,5030,7
321x224=321,8,48,24,224,4,3,31,6304,7
321x240=321,8,48,24,240,4,3,15,6304,7
321x256=321,8,48,24,256,3,2,1,6304,7
384x224=384,8,56,32,224,4,3,31,7546,7
384x240=384,8,56,32,240,4,3,15,7546,7
384x256=384,8,56,32,256,3,2,1,7546,7
392x240=392,8,56,32,240,4,3,15,7671,7
640x240=640,16,64,48,240,4,3,15,12073,7
640x288=640,16,64,48,288,5,3,19,12338,7
641x480=641,16,64,48,480,8,6,30,12089,15
801x600=801,24,80,56,600,4,3,21,15088,15
Courtesy of [Mad]!
Now that the custom resolutions are in there, turn on Powerstrip, go to configure under display profiles, then to Advanced Timing Options, and then to Custom Resolutions. Now, click on the button that says "User Defined Resolutions", you should see all the resolutions that we pasted on there before. Add one of the resolutions with 224 vertical lines, just to try. When it prompts you to restart the computer, accept, and reboot the computer again without a monitor plugged in.
Now, close powerstrip, and go to the Ultimarc site and download the utility called QuickRes. Once you run that program, you will get a little Galaxian ship right by the clock. When you left click on that, it will come up with a list of the available resolutions for the display driver. Click the resolution that you just added, and now the card should be outputting the right signal for the arcade monitor.
Plug in the Arcade monitor and see some windows goodness in whatever non-interlaced resolution you picked!
Let me know if this works for you, and also let me know what video card you are using specifically.