the arduino software is looking for spi.h in a example code
"SPI.h: No such file or directory." Now I added an SPI folder in the libraries but after verifying it shows another error. I did the same thing to others but the compiler is looking for more and more files. What can I do? By the way, I'm using a Gizduino+ w/ ATmega644.


Did you check the product web-page for the IDE patch. You must install the core for this Arduino clone. There might be some issues with which version of the IDE to use and what version of the library. Check the product web-page for more details. 

Your question is too product specific and this is not that type of support page. 

Cheers!