getting GCC4 on a GGC4 build ....

I've just created my self a GCC4 image from a linux mint 11 machine using the following set of commands;

sudo apt-get install git yasm autoconf automake texinfo flex bison gawk build-essential unzip wget zip less zlib1g-dev
sudo apt-get install uboot-mkimage util-linux mtools
sudo apt-get install gcc-multilib g++-multilib libc6-dev-i386
git clone git://git.haiku-os.org/buildtools
git clone git://git.haiku-os.org/haiku
./configure --build-cross-tools-gcc4 x86 ../buildtools
pushd ../buildtools/jam
make
popd
export PATH=../buildtools/jam/bin.linuxx86/:$PATH
jam -q -j4 haiku-image
dd bs=1M if=generated/haiku.image of=/dev/sdb

(where /dev/sdb is a 4G usb flash drive)
then I rebooted, and installed onto /dev/sda6 (my haiku partition, that grub can boot)
which was make with the alpha 3 ...
so the install put a new shiny kernel but if I type gcc --version I get the old version 2.x
not the 4.x gcc that the kernel was build with, and I assume any apps I build will not run as the abi will be wrong.

is there a way to get a build that includes the gcc I want ?