The local coord is generally 320,240 for a 640 X 480 resolution. Another method that can/may work also, is to edit out the line for local coord on you characters.
I like the animation and overall feel of the stage. Since this is supposed to be Hi res, take note that the stage suffers from heavy color loss. Photoshop has methods to remedy this and with patience you will achieve awesome results.
The link to mugenguild has very few stages and a lot of good ones are missing. The mediafire link has a much larger number. You can always use Google images to see pics of the stages if you don't want to try out each and every one.
Exshadow made this stage. Its called Sky Fortress, file name XX'SKY'FORTRESS'XX. Hope its what you're looking for.
http://www.mediafire.com/?hqo13h6r17g3b
I like your low res take on this stage quite a bit