Installing gradients into PSP8

I've been having problems installing gradients in PSP8 ever since I first installed it. PSP7 was easier, seeing as you just had to move a .BMP image into the folder and it would automatically get added, but somehow, it's not working that way. Brushes are imported, but so far I haven't seen an option to add gradients into the program anywhere.

The folder of gradients right now only has files that end in ".PspGradient". The set of gradients I just downloaded ends in ".grd", and the user says that they are meant to be used in PSP8, but the problem is I can't figure out how.

Any help would be greatly appreciated, and I apologize if this isn't allowed here.