I don't have PSE6, but I did find these instructions: (
https://www.elementsvillage.com/forums/showthread.php?t=33090)
To Install STYLES into PSE6:
1. Make sure PSE is closed.
2. Locate your style file. It should have the .asl file extension. Copy this file.
3. Paste your .asl file into the following directory:
C:\Documents & Setting\All Users|Application Data\Adobe\Photoshop Elements\6.0\Locale\en-US\Photo Creations\Layer Styles
Vista Users: C:\Program Data\Adobe\Photoshop Elements\6.0\Locale\ en-US\Photo Creations\Layer Styles
4. Locate the .xml file included with your style. Copy this file.
5. Paste your .xml file into the following directory:
C:\Documents & Setting\All Users|Application Data\Adobe\Photoshop Elements\6.0\Locale\en-US\Photo Creations Metadata\Layer Styles
Vista Users: C:\ProgramData\Adobe\Photoshop Elements\6.0\Locale\en-US\Photo Creations Metadata\Layer Styles
6. Start PSE.
7. You can now access your styles in the styles palette under SHOW ALL.
(If your new styles do not show up at this point, you can try the following. Go to the following directory, find the file MediaDatabase.bd3 then rename it MediaDatabaseOLD.bd3.
C: Documents & Setting\All Users|Application Data\Adobe\Photoshop Elements\6.0\Locale\en-US