PS3 Update to System Software 4.89: Here's a Full Guide for You - MiniTool Partition Wizard
PS3 News: multiMAN 4.85 released coming with support for CFW 4.83 to 4.85 - First update to this highly popular backup manager since the release of FW 4.82! , psx place multiman - thirstymag.com
PS3 Firmware 4.82 released, one year after last update & mere days after 4.81 exploit revealed - Wololo.net