Dell’s GWA-4164B is an OEM LG writer. LG’s policy for OEM writers is somewhat peculiar : they make these special OEM models for computer manufacturers who bundle them with the systems they sell. The computer manufacturers are expected to provide all the support for these drives (firmware etc). That is why you have difficulty finding information about them : LG doesn’t release information on them at all.
The GWA-4164B should be based on the same Panasonic chipset as the GSA-4166B except that it has no DVD-RAM support and no lightscribe support. I believe they do support DL writing.
As for cross flashing, you may be able to cross flash it to a 4166B and may be able to get DVD-RAM support. However, you almost certainly cannot get lightscribe capability. More information here :
http://club.cdfreaks.com/showpost.php?p=1289272&postcount=4 (see Q21)