>>351
artwork\invaders\default.lay のXMLファイルをエディタで開いて、下記のように編集
invaders.zipに固まってたら解凍して編集

<!-- invaders.lay -->
<mamelayout version="2">
<element name="Cellophane">
<rect> <bounds left="0" top="0" right="3000" bottom="800" /> <color red="1" green="1" blue="1" /> </rect> <rect>
<bounds left="0" top="800" right="3000" bottom="805" /> <color red="1" green="1" blue="1" /> </rect> <rect>
<bounds left="0" top="805" right="3000" bottom="1279" /> <color red="0.25" green="0.75" blue="1" /> </rect> <rect>
<bounds left="0" top="1279" right="3000" bottom="1284" /> <color red="1" green="1" blue="1" /> </rect> <rect>
<bounds left="0" top="1284" right="3000" bottom="1758" /> <color red="0.25" green="1" blue="0.75" /> </rect> <rect>
<bounds left="0" top="1758" right="3000" bottom="1763" /> <color red="1" green="1" blue="1" /> </rect> <rect>