Ripping Questions

[arrogantfrenchsonic]

I need help with ripping. I want to do backgrounds in Genesis games, but am lost on how to get the right image size. I use Kgens since it has layer disabling and try to get the backgrounds but come across a couple of issues. One, not the whole background is right there in front of you and requires scrolling forwards or up or even down within the level to get the whole thing. I can't imagine going through that and getting the perfect whole image of the background. 2nd problem, the resolution. I take screenshots and they're always 320x240 when a window or 640x480 in full screen. That can't be right. I want the exact size as the original picture is in the game rom. I see a lot of backgrounds that are ripped properly on this site have a typical size of 256x256 or 256x128 etc.. How do you go about getting the original resolution?

Getting the right resolution coupled with getting the whole image if it's not just right in front of you without moving around the level more just confuses me. Is there a way to rip straight out of the rom that's more typical for getting the proper rips, or some technique I'm missing?

Thanks for any help.