Right... However could you please be a bit more specific since I -at least- can´t find that file anywere.
I run a win 7 OS with a retali version of the game (european)
The geralt_basic.xml and all the others xml files are packed in pack0.dzip. Here is the unpacked and unedited geralt_basic.xml file : Link. Place it in The Witcher 2\CookedPC\abilities (create "abilities" folder if you don't have it already).
it doesn't work either. followed your instructions.
Under which category or ability in the XML? Is it "geraltbonus"?