The customizer is to complex.

dude the customizer is easy as pie.
jsut make your shortcuts then OK it, and save the FILES it creates with your Trainer, the real trainer and not a shortcut. the trainer launches and reads that file and adjusts accordingly.

or get a new keyboard, or a USB numpad.

I dont need any help with that anymore, I have about 7 different keyboards, not sure on mouses, 3 monitors and every 4 months I switch my tower case.

Problem solved. (lol)