cyberskunk has released two very useful PKG’s, one called Boot OtherOS++, which as the name suggests, boots OtherOS and OtherOS prep Tool, which prepares your PS3 HDD for installing Linux, here is a quote from the source:

OtherOS Prep Tool is used to prepare your system vflash and install petitboot ready to install Linux. IT DOES NOT INSTALL LINUX. For tutorials and videos on how to install Linux head over to gitbrew.org. OtherOS Prep Tool is based off of graf_chokolo’s and glevand’s source and is a one or two step solution to getting petitboot up and running and on your way to installing Linux on to USB or PS3 Hard Disk. At the moment it only supports 3.55 but we will add support for lower firmware soon.

REQUIREMENTS

16MB NOR PS3 (Model CECHH or Higher)

3.55 OtherOS++ enabled firmware installed

(If you want to use REBUG 3.55.1 grab PS3MFW Builder 0.2 Portable
from here with the tasks pre-selected to add OtherOS++ support)

FEATURES

One Step Prep if installing OtherOS to USB Hard Disk

Two Step Prep if installing OtherOS to PS3 Hard Disk

Resize vflash to 6 different sizes

(Original, 11GB, 22,GB, 43GB, 65GB and 83GB)

Create or Delete vflash region 5, 6 and 7 separately

Create or Delete ALL vflash regions at once

dtbImage.ps3.bin included in pkg (no need to have it ready on USB)

Install different dtbImage.ps3.bin from USB

Checks that vflash region 7 create matches vflash size

Detects and displays current vflash size on start up

Auto matches new size to current size on start up

Download and Source