1. Computer
2. Local Disk(C:)
3. ijji Folder > ENGLISH > Gunz > Config
4. Open the config file with 'Notepad'
5. Put this code in, exchange for the other. Keep the other in case you want to switch. If you forget to save it, here.

Normal:

<VIDEO>

<WIDTH>800</WIDTH>

<HEIGHT>600</HEIGHT>

<COLORBITS>8</COLORBITS>

<GAMMA>255</GAMMA>

<FULLSCREEN>TRUE</FULLSCREEN>

<REFLECTION>false</REFLECTION>

<LIGHTMAP>false</LIGHTMAP>

<DYNAMICLIGHT>false</DYNAMICLIGHT>

<SHADER>false</SHADER>

<CHARACTORTEXTURELEVEL>0</CHARACTORTEXTURELEVEL>

<MAPTEXTURELEVEL>8</MAPTEXTURELEVEL>

<EFFECTLEVEL>0</EFFECTLEVEL>

<TEXTUREFORMAT>8</TEXTUREFORMAT>

<MOVINGPICTURERESOLUTION>0</MOVINGPICTURERESOLUTION>

<MOVINGPICTUREFILSIZE>0</MOVINGPICTUREFILSIZE>

<NHARDWARETNL>false</NHARDWARETNL>

</VIDEO>


Archetype:

<VIDEO>
<WIDTH>640</WIDTH>
<HEIGHT>480</HEIGHT>
<COLORBITS>8</COLORBITS>
<GAMMA>255</GAMMA>
<FULLSCREEN>TRUE</FULLSCREEN>
<REFLECTION>false</REFLECTION>
<LIGHTMAP>false</LIGHTMAP>
<DYNAMICLIGHT>false</DYNAMICLIGHT>
<SHADER>false</SHADER>
<CHARACTORTEXTURELEVEL>2</CHARACTORTEXTURELEVEL>
<MAPTEXTURELEVEL>8</MAPTEXTURELEVEL>
<EFFECTLEVEL>0</EFFECTLEVEL>
<TEXTUREFORMAT>8</TEXTUREFORMAT>
<NHARDWARETNL>false</NHARDWARETNL>
</VIDEO>

Steps:
http://i53.tinypic.com/2jbw11h.jpg
http://i53.tinypic.com/2w523y8.jpg
http://i51.tinypic.com/2a4qttg.jpg
http://i55.tinypic.com/osbnlz.jpg