Search it on google, it should come up on a site called ps3hax - then install the installer on your pc, and install the pkg file on your ps3 - reboot the ps3, run the ccapi on the ps3 then enable it on your console - reboot console again - it will say that it has loaded successfully as a notify on your console - then go to your pc - load the program on your pc - add console - (select the correct kind of console you are using (cex/dex)) - type in your consoles ip - BAM!!! done
Enstone didn't make CCAPI for CFW made on 4.76. You can downgrade to 4.75 or lower but I don't recommend it because CCAPI will arrive to 4.76 CFW eventually
All you need to do is look on Google or Yotube for one that meets your CFW requirements since some don't support CCAPI... Look at the videos below for CCAPI 2.50 and 2.60... It will also show you how to install it on your PS3