I don't believe there is a way to create all the intersection points at one command.
You could record a journal to create one point, then edit it so you can
- select all the curves in one direction
- select all the cross curves
- loop thru both & create an intersection point at each pair.
Production: NX10.0.3.5 MP16/TC11.2
I'd rather be e-steamed than e-diseaseled
I found an old grip program that does what you want.
I have attached the source and the executable. It is compiled with NX12 as I don't have NX8.5.
If it doesn't work you need to compile and link the .grs file with your NX8.5 "NX Open Grip" application under the Tools sub menu.
There is a soft limit os 10,000 curves in each selection group but can easily be increased.
Hope it helps