how to modify the i/o permissions bitmap

[n2jesus]

I have written some programs on a 98 system that I would like to run on 2000. The problem is, these programs use very high speed parallel port communications with external electronics gear. So, 2000 will not let the info go to the port because I'm in ring 3.

I've read that you can modify the i/o permissions bitmap to allow a ring 3 program to run and communicate straight to ring 0, but can't find any instruction on how. Writing device drivers is not an option, so I need to find a way to allow the program to talk straight to the ports.

Can anyone tell me how to modify this i/o permissions bitmap?

Thanks for any help,

jim