That line alone won't do anything to the graphic library. I think Preenv needs a more up to date version from WebOS libraries then we can be surely play most of the games. May be I'm wrong though.

Use a text editor: vi, nano, leafpad etc.

For example, as root:

thanks but I still have black pix
any advice?

And did you add the two lines in it? What game are you trying to fix?

@jackobkorf, @thaDocX: Sorry, if the file is in the right location containing the correct 2 lines then I don't know why you're still getting corrupted graphics.

1. open terminal

2. enter "root"

3. change the directory to where the game package file is

4. dpkg -i --install-dir=/home/user/MyDocs/Game com.gamename.ipk

5. create a directory /opt/usr/palm/applications

6. create the game directory to /opt/usr/palm/applications/GAMENAME

7. copy the appinfo.json and icon file to /opt/usr/palm/applications/GAMENAME

8. create the gamefiles directory in /opt/usr/palm/applications/gamename/gamename

9. copy the executable binary file from MyDocs to the game directory /opt/usr/palm/applications/gamename/gamename

10. change the rightrs of the executable binary file chmod +x binaryfile

11. symblink the directories and other files from /home/user/MyDocs/Game/gamename/gamename/ to /opt/usr/palm/applications/gamename/gamename

Multiple files linking in terminal:
for file in /home/user/MyDocs/Games/com.gameloft.gamename/* ; do ln -s "$file" /opt/usr/palm/applications/com.gameloft.gamename ; done

-create a folder with game name in the 2GB partition of your beloved phone (/home/user/<your game dir> or /home/user/<any subdirectory>/<your game dir>)