PS Jailbreak modchip dongle can uesed only on PS3 console version 3.55 or lower.
PS Jailbreak new feature: Upgradable, No need HD disc.
PS Jailbreak is a USB plug and play solution that installs in seconds, keeping your valid warranty seal in tact.
Easy to use installer and GUI takes you step by step.
Compatible with all production models FAT and SLIM, which firmware is 3.55 or lower. Supports all regions: USA, JAP, PAL and KOREA
PS Jailbreak disables forced software updates and will never brick your console.
Supports all games (it does not allow backups of bluray movies , dvd movies , or past consoles games)
Backup games to your internal hard drive or external hard drive through USB, and boot directly off GUI. Eliminating the need for expensive blueray burners and costly blank media.
Play backups off your hard drives 2x as fast as off the blueray drive. This eliminates lags and glitches to provide you with smoother game play.
Open up your console to a new generation of homebrew applications. Load homebrew apps/games off any USB hard drive/flash drive.
Fully updatable with new features/updates by connecting PS Jailbreak to any computers USB port.

Upgrade Instruction:
Download and install Atmel FLIP 3.4.2
When installed,go to installation folder, namely Atmel\Flip 3.4.2\usb\, find libusb0.dll and libusb0_x64.dll, copy them to folder Flip 3.4.2\bin
Then plug PSjailbreak into USB port in PC, the red green light will light up.
Meanwhile PC reminds you that unusable unkown device found.
Ignore it, wait for a few seconds, new hardware AT90USB162 DFU will be found, pc asks you to provide driver,

choose USB folder in Flip as the Install Path, for example Atmel\Flip 3.4.2\usb\

then the installation begins.

When the driver is installed, we can write on AT90USB162.

Run Flip, go to Device -> Select..., and choose AT90USB162

Then go to File -> Load HEX File...

Choose the HEX file you want to write into,
PSjailbreak_v1_0913.hex
PSjailbreak_lv2_test0919.hex
PSjailbreak_lv2_hermes_beta0923.hex
PSjailbreak_jevinskie_3_01_beta1005.hex
PSjailbreak_jevinskie_3_15_beta1005.hex
PSjailbreak_jevinskie_3_41_beta1005.hex
PSjailbreak_hermes_v3_beta1006.hex(New!)
Attention: HEX must be put in the English path so that it can be read
Then you can see HEX file parsed shown in the left bottom. 
Then go to Settings -> Communication ->USB, choose OPEN USB port.

Then the chip is open and ready to be written.

Check HEX File, make sure if it’s the right HEX that you want to write into.
Choose RUN in the left bottom, then the chip is being written. It will be done in a few seconds. You will see Verify PASS in the left bottom when it’s finished.

Now the chip has been written. Turn off Flip and unplug the PS jailbreak dongle out of PC.
How to use PSJSILBREAK to downgrade your console
We will have a specific test of E3 downgrade function. The following downgrade process can be a instruction reference.
All we need for this test:
• A PS3 console of version 3.42 or above.
• A piece of PSJAILBREAK dongle.
• FAT32 USB flash drive with space over 130 MB.
Download downgrade firmware and 3.41 system firmware, decompress to a folder
Downgrade will format your hard drive, please backup all your data in the hard drive in advance.
1, Write the downgrade firmware into the PSJAILBREAK. The procedure is exactly the same as psjailbreak firmware written.
2, Ensure the console is power off, then insert psjailbreak into the right USB interface, then turn on the console again, press the out key as soon as you turn on the console, from this moment on do not power off till the end.
3,After screen flickers several times, the console turn off automatically, power light is red, which means entering factory service mode.
4,Find a USB flash drive, format it as FAT 32 system. Copy the downgrade file into the flash drive.
5,Put Lv2diag.self file from FILE1 directory and PS3UPDAT.PUP from PUP directory to this flash drive, make sure there’s no other files in it, insert this drive to the right USD interface(unplug other USB devices if there is any), then turn on the console.
6, Downgrade automatically processes right after the console starts up, and ends as the console turns off automatically.
7,unplug the flash drive, delete all files in it, then copy Lv2diag.self file from FILE 2 directory into it, then insert the flash drive into the right USB interface,restart the console.
8,Downgrade complete.
This instruction applies to all Atmel chipset dongle.