Upgrading Mandriva 2006 to Mandriva 2007

Simple:
1) download the iso image of Mandriva 2007.0 and create a bootable DVD
2) select upgrade during the installation process
3) get a big cup of coffe
4) Enjoy.

The process is not so smooth but at the end works.
Y'll probably get problems with Xorg.

First of all you must update your urpmi.cfg, that's mine:
2007Main ftp://ftp.proxad.net/pub/Distributions_Linux/Mandrake/official/2007.0/i586/media/main/release {
hdlist: hdlist.2007Main.cz
key-ids: 70771ff3
update
with_hdlist: media_info/hdlist.cz
}

2007Contrib ftp://ftp.proxad.net/pub/Distributions_Linux/Mandrake/official/2007.0/i586/media/contrib/release {
hdlist: hdlist.2007Contrib.cz
key-ids: 78d019f5
update
with_hdlist: media_info/hdlist.cz
}

2007PlfNonFree ftp://ftp.cica.es/mirrors/Linux/plf/mandrake/2007.0/non-free/release/binary/i586 {
hdlist: hdlist.2007PlfNonFree.cz
key-ids: caba22ae
with_hdlist: ./hdlist.cz
}

2007PlfFree ftp://ftp.cica.es/mirrors/Linux/plf/mandrake/2007.0/free/release/binary/i586 {
hdlist: hdlist.2007PlfFree.cz
key-ids: caba22ae
update
with_hdlist: ./hdlist.cz
}


urpmi.update -a
urpmi --auto-select

The upgrade procedure make some mistake, cause it leaves some old package so, you must clean your system by hand , for example in my case I had to uninstall all gnome 2.10 libraries.