4.86 not loading help

Hi ps3 super slim 500gb today i set up my ps3 device / system update i made 4.86 update online (acidentally)
question 1
Can I install HEN?

question 2
HFW_4.86 file into fat32 format flash disk I copied PS3 / UPDATE / PS3UPDAT.PUP but the settings / system update does not find this file The second method is via safe mode but still cannot find the file. what is the problem?

question 3
via http://ps3xploit.com/ I choose PS3Hen / Hen installer enabler, but I get an error picture...

4.86 not loading help