Key swap on internal keyboard

Hello,

it's about a hp elitebook 8770w on Yosemite. The internal keyboard has two keys swapped. An external keyboard connected via USB is fine.

How can I fix this? On Mavericks I had it fixed (I remember it took me like forever there, but I don't remember how I did it). I hoped it was simply done by VoodooPS2, but when I try my Mavericks' VoodooPS2, it doesn't change anything.

Using simply Ukulele to swap them in general doesn't fix it without breaking it for the other.

Thanks in advance!