(adsbygoogle = window.adsbygoogle || []).push({}); Ok so first off, i dont take any credit for this, im just a google nerd...
Its a bash script to convert 3.41 to 3.55 PKG's.

    #!/bin/bash



#Wutangrza's lazy man's script to convert from existing 3.41 pkg to 3.55 pkg installable with GEO's CFW

#You have to have PSL1GHT and all the other goodness installed already



EXPECTED_ARGS=2

E_BADARGS=65



if [ $# -ne $EXPECTED_ARGS ]

then

  echo "Usage: `basename $0` old.3.41.pkg new.3.55.pkg"

  exit $E_BADARGS

fi



#change these if they're a different path for you

export PS3DEV=/usr/local/ps3dev

export PATH=$PATH:$PS3DEV/bin

export PATH=$PATH:$PS3DEV/ppu/bin

export PATH=$PATH:$PS3DEV/spu/bin

export PSL1GHT=~/PSL1GHT/psl1ght/build

PSKEYS=~/.ps3

PSUTILS=~/ps3utils

PSTOOLS=~/ps3tools

PSPUBTOOLS=~/ps3publictools



#update all tools, comment out if you want to skip this

#cd $PSKEYS && git pull && cd $PSUTILS && git pull && make && cd $PSTOOLS && git pull && make && cd $PSPUBTOOLS && git pull && make



OLDPKG=$1

NEWPKG=$2

oldPWD=`pwd`



rm -rf /tmp/crap123

mkdir /tmp/crap123

cd /tmp/crap123 

#hackish, but pkg.py won't let me tell it where to extract?

$PSL1GHT/bin/pkg.py -x "$1"

#this is really hackish, but eff you, dont use it if you dont like it

DIRNAME=`ls /tmp/crap123`

$PSTOOLS/unself ${DIRNAME}/USRDIR/EBOOT.BIN crap.elf

$PSPUBTOOLS/bin/make_self_npdrm crap.elf EBOOT.BIN ${DIRNAME}

mv EBOOT.BIN ${DIRNAME}/USRDIR/

$PSL1GHT/bin/pkg.py --contentid ${DIRNAME} /tmp/crap123/${DIRNAME}/ "$2"

$PSPUBTOOLS/bin/package_finalize "$2"

cd $oldPWD

mv /tmp/crap123/"$2" "./$2"

rm -rf /tmp/crap123

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You need ALL of the ps3 tools though by geohot, kakarotos fail0verflow make sure you got em all