Migration From Ubuntu 9.04 to dual boot(windows xp + kubuntu 10.04) on lenovo r400

Today i migrated from Ubuntu 9.04 to above dual boot system on my lenovo r400. I followed the following steps

(1)First backup all your data on external hard disk
(2)Second boot up with widows xp cd
(3)You will get a blue screen of death
(4)So reboot and during restart enter bios by repeatedly pressing F2. Change the settings of
SATA in bios from AHCI to compatibility mode
(5)Windows will get loaded. Now your next task is partitioning the hard disk
(6)I created the following partition

partition 1 30 gb
partition 2 94 gb
partition 3 25 gb
(7)In case you may be wondering why the above partitions. First partiton is sized up so that
later i can install windows 7 in it. Second partition is for data. Third is for linux
(8)Windows XP gets installed. Then you need to get drivers for xp for your particular laptop in
my case drivers failed to install
(9)Then i installed kubuntu 9.04, since i did not had cd for 10.04. Of course its easier to install
10.04 using its own cd.
(10)Then i configured internet by putting ip address and proxy settings in system settings. This
was enough to get net working
(11)Audio and video both were not coming from the system.
(12)First get apt-get running by putting following in .bashrc
#proxy
export http_proxy="http://proxy:port/"
export ftp_proxy="ftp://proxy:port/"
(13)Now apt-get and package handler of kde will start working properly. Second install
libxone1-ffmpeg using mpeg amarok will start working
(14)Install vlc using apt-get video will start working but sound will not come in vlc
(15)Increase the volume setting of pcm in kmix, sound will start coming out from vlc
(16)Then install all updates of update notifier using kpackage kit. This is essential before
upgrading to 10.04
(17)Now search google there are 2-3 steps in starting update process in terminal
(18)Now you have your kubuntu 10.04
(19)Now in kubuntu i put network configuration( ip address and proxy) in system config
(20)Now internet works. But then kpackage kit and apt-get and sound and video still do not
work
(21)To get sound and video to work i followed my steps for kubuntu 9.10
(22)To get kpackage kit to work i put the following lines in .bashrc and /etc/profile.d/proxy.sh
#proxy
export http_proxy="http://192.168.15.2:8000/"
export ftp_proxy="ftp://192.168.15.2:8000/"
export HTTP_PROXY="http://192.168.15.2:8000/"
export FTP_PROXY="ftp://192.168.15.2:8000/"
(23)Then to get apt-get working i put the following lines in /etc/apt/apt.conf.d/70debconf
Acquire::http::Proxy "http://192.168.15.2:8000";
Acquire::ftp::Proxy "http://192.168.15.2:8000";

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