Installing CFW

Hello Friends,

I have recently got my old ps3 out from the attic that has had cfw installed previously , its currently on OFW 4.80 and I was wondering if I could install a cfw without an e3 flasher if so how?

Only just getting back to modding , sorry as I have forgot everything back from when 3.55 was released .

Slim Model: CECH -2003A

Thanks.