http://jailbreakps3.weebly.com
1 - If you are on the 3.55 CFW, DO NOT Upgrade to 3.56 OFW as it will Brick Your PS3
2 - You MUST GO back to the Official 3.55 before upgrading to 3.56 (visit PS3 site for 3.55 OFW or Official 3.55 Update )
3 - Remove ALL Firmware, any kind of multiMAN, File Manager or anything created by PS3 users. Use this before you Update if you want to be really safe. Erase Me v2 Download from here http://www.multiupload.com/ZKKBP904V0 to Erase all Firmware.
4 - Get PS3 Jailbreak Manager 3.56 CFW from websie which you will copy into your usb and then insert into your Playstation.
5 - You need FTP Server PKG which you will get from heres
http://jailbreakps3.weebly.com
    Instructions are on the site how to install it