Hi MaceUK71,
if the workaround Red0og posted didn't work, then I have only one idea left what the problem could be. Do you have the Steam version of The Witcher 2? As far as I know there might be problems if you downloaded the 3.4 patch separately, since Steam downloads 3.4 on its own.
But just to be completely sure that there is not a small problem we haven't noticed I will recap every step you should take to play Lykaon.
Download patch 3.4 for The Witcher 2 (or the Redkit patch if you want to do mods yourself). Then go to MyDocuments\Witcher 2\ and create a folder called "UserContent".
Download Lykaon and unzip it. Copy the folder "Lykaon" into "User Content".
Now you should see Lykaon in your userContentManager. If you don't, you should still try out to start The Witcher 2 and click on "New Game" and there should be "UserContent" with Lykaon in it.
Maybe you already did all these things, but I just wanted to write it step by step again in case there might be one little problem that is causing all this.
If it still doesn't work you should maybe write TechSupport. I am really sorry that you can't play it, but unfortunately I can't help you any more with this problem since it seems to be a problem with Redkit itself and not the mod. And I am no expert in that. :/
I hope you can get it working!