would it work if i bypassed the spool valves?

Basically, the others are right. You have what is called an open center hydraulic system where all the GPM capacity of the pump is flowing whenever the pump is running. The flow divider makes sure that the steering gets the correct flow under pressure and lets the rest flow back to the tank or pump at low pressure. This is the most horsepower efficient way to handle it. Even if you add the relief valve it will take HP away from you to build enough pressure to bypass it, and will heat up your hydraulic oil.

If you run the hyd pump direct to the steering motor you risk overpressuring and blowing the seals out of the steering motor. Also the pump will may overheat and the engine will lose a couple HP driving the partially dead-headed pump!

I don't know for sure, but I would hazard a guess that running the pump direct through the power steering won't be good for something. The engine lugs a little when you pull the lever, doesn't it? I think you'll have that all the time if you run the power steering directly. It's robbing horsepower that you probably would rather have to pull with, right?