Need help installing apps on the 50g

[Fanboy]

I Don't know how to get plotxyz to work despite reading the documentation. I've already given up on hldraw. My calc freezes when I try certain inputs. So while I'm still at it, is there a way I can plot 3d parametric graphs on the HP50g? The parametric form is F(t) = <x(t),y(t),z(t)>. My other other calc does it nicely in 2d but not 3d.