The installation process is composed by two stages.

The first stage starts just after you  boot from the CD-ROM ISO image.
After a few questions  (language, nationality, keyboard), you will  be
asked  to  partition your disk.     Please backup  your  data   before
proceeding  and be extremely  careful  before  writing changes to  the
disk.

After you have  set up the target partition   a minimal Debian  system
will be  installed on it.

Then the installer will auto-probe for other operating systems present
on your  hard disk(s) and  ask  whether you want   to install the Grub
boot-loader on  the master boot record. If  all your operating systems
are listed among the detected ones, just answer "yes".

Your computer  will  be restarted   to  start the  second installation
stage.

Please make sure that your CD-ROM is  ejected during the re-boot, then
when the greeting message appears insert it again.

After the  greeting you will be asked  to set your  timezone, to enter
the root password and to make a new user account for yourself.

Then a task list will appear, letting  you select which components yow
want  to  be installed.   Pressing tab will  switch between  the three
buttons at the bottom ("Finish", "Task Info", "Help"). If you want all
the tasks to be installed just press "A" and then "Finish".

Finally the installer  will try to auto-configure  you video card  and
start the X graphic  system. Please contact   the mailing list  [0] in
case of failure.

[0] http://lists.agnula.org/cgi-bin/mailman/listinfo/users