can boot only from USB

hello everyone, i'm a noob on hacks and i've done my first installation on my old PC equipped with p5p43td pro mono and a 2.83 ghz core duo quad cpu, everything seems to work smoothly but as other users i can only boot from the usb, without the system boot start to loop after the apple logo, i'm trying to follow this step in the troubleshooting guide

• Remove everything inside EFI/CLOVER/ from the system drive, and replace it with everything inside EFI/CLOVER/ from the USB drive

but i can't find the EFI/CLOVER folder in my usb key, i'm missing something?

thanks in advice for your help

There are two EFI s. One is in the hard drive and the other one is in usb. You should use Clover Configurator to mount both of the EFI s.