get online with cfw ps3 (HELP ME)

hey, so iv been struggling to get online all day but iv just came across a vid on YouTube, the guy on the vid used a SEN enabler to get online and it worked, but he was running rebug 4.21 spoofed to 4.55, I have the link to the program but I'm running regero 4.55 spoofed to 4.66, can I still use the program?

thanks in advance