Building and Installing the SDK:

1. Download latest snapshot: ftp://ftp.trolltech.com/qtopia/snapshots
2. Copy arm-gcc-compiler from earlier SDK to /usr/local/arm-linux
3. add to PATH: /usr/local/arm-linux/bin
4. mkdir -p /opt/toolchains/greenphone/gcc-4.1.1-glibc-2.3.6/arm-linux
5. cd /opt/toolchains/greenphone/gcc-4.1.1-glibc-2.3.6/arm-linux && ln -s /usr/local/arm-linux arm-linux
6. cd /path/where/snapshot/is
7. tar xzf qtopia-opensource-src-4.x.x-snapshot-200xxxxx.tar.gz
8. mkdir build
9. cd build
10. ../qtopia-opensource-src-4.x.x-snapshot-200xxxxx/configure -device greenphone -no-bluetooth
11. make && make install

Creating and installing a new flash-image (connect your Greenphone prior to the PC):

1. ifconfig usb0 10.10.10.21 netmask 255.0.0.0 broadcast 10.255.255.255 up
2. scripts/greenphone-make-flash.sh --qtopia --qtopia-build image/
3. scripts/greenphone-sdk/scripts/updatedevice qtopia-greenphone-update.tar.gz
4. the Greenphone should reboot after this and voila