installing is simple.follow-
1.run setup.a dialog box with 3 options will
appear.select 'install Visula Studio 2008'

2.then after some copying installation
wizard will appear.click next to proceed.
in the next window you will see which parts
needed are installed before and which will
be installed by the installer and a
license agreement.check-'I have read and accept
the license terms'and click next.

3.from the next window selecet your destination
directory where visual studio will be installed.
and then click install.

uninstalling it is a difficult task.follow my
observation and solution-

observation-"when I first used visual studio,I
installed it successfully but later I got errors
on ralating assembly manifest plus other errors.so
I was unable to debug programs.so I uninstalled the
visual studio and tried to install it again but
installation was failed because installer was unable
to install dot net framework."

solution-"I tried by different ways and at last
found that installing windows xp by formatting
a drive where i want to install visual studio is
the solution for install it again.but later I
found that without installing XP or formatting a
drive for installing visual studio 08,there is
another way is-use dot net framework removing tool
from microsoft and then install again visual
studio 2008.see my previous post about the
features on that tool"