Texture looks hi res in nifskope, low res in GECK

[mungbeanz]

Hi all,

 

I've been trying make a big billboard out of a small model - Dungeons\Vault\Accessories\VChalkboard02.NIF

I've mapped a hi resolution texture to it in Nifskope, but when I import it into the GECK the resolution looks super low (like the original texture resolution of the model). I've tried scaling up the model but the texture remains low res. Is there a property somewhere in Nifskope I have to edit to increase the resolution of the texture?

Thanks very much.