The problem, as stated in the other thread, is, that your drive is an OEM drive, that is specially made for computer manufacturers like Dell, HP, Sony and others. LG does not provide firmware updates for these OEM drives!
can someone please give me the name+direct link to an updated driver for my drive?
If your drive came as part of a computer, then you might check the support website of the computer's manufacturer in order to get a firmware update.
LG only provides updates for their retail products. And your drive isn't.
whats the difference between GWA and GSA and why was crossflashing suggested? (don't know what that is!)
GWA series is intended to be sold only to computer manufacturers. GSA drives are sold to retail customers. Also there are technical differences, maybe in hardware, maybe in firmware only. If the latter is true, then you can turn your GWA into a GSA drive (that is called crossflashing), for wich you can get firmware updates directly from LG. But you would void your warranty doing so.
hopefully that will solve the problem of burning sony 4xDVD+RW at 4x speed!
There is no guarantee, that these media will burn at full speed after flashing another firmware. But there is a chance, that you stick with a fried drive, if crossflashing does not work.
So, just use these media with reduced speed as long as they last, and after that, get other ones that are more compatible with your drive.