Run a program from another turtle

So I've got turtle A and turtle B. I want A to go to B and start a program on B. Is this possible?
I could do it with rednet, but is there another way if both are next to each other?

I've tried peripheral.call(), until I realized it's only for methods… any way to do this?

You could do it by placing a disk drive, putting a disk in with a properly crafted startup file, and using the peripheral methods to reboot the other turtle. Or write a couple rednet programs to let you do this.