. . . Alternative ways to download and install, see 7th post in this thread. . . 
INSTALLING MANDRAKE 10.0 OFFICIAL( General instructions )
- Preparation: If this is your first Linux install, check out
Basic Rules for Install If you are replacing a previous Mandrake Install back up: - Your
browser plugins located in /usr/lib/mozilla/plugins and /usr/lib/mozilla-1.4/plugins ( or 1.6

) - The ~/evolution directory ( When I restore it, I chown it back to "chown -R bruno:bruno evolution" )- The ~/.galeon/bookmarks.xbel ( or other bookmarks ) - Personal things in your /home directory - Your /etc/lilo.conf ( if you are booting mutiple distro´s ) - Your /etc/hosts, /etc/modules.conf, /etc/aliases, /etc/rc.d/rc.local, ~/.bashrc, ~/.exrc if you made any modification to these files.
- Set your BIOS to boot from CD and disable PNP aware OS. - There are no errata available yet. -
- Put the first CD in the CD-ROM drive and boot your computer. 1st screen: The welcome screen.
Press Enter Before the GUI comes back the installer is loading into memory and devices are configured
2nd screen: Language selection, default is US English,
Press Next 3rd screen: License agreement, select "yes" and
Press Next 4th screen: Is this an install or an upgrade ? ( Click to enlarge )

Tick the box of "
install" and
Press Next ( Advice: NEVER use Upgrade !!! )
5th screen: Security level, fill in "root" or your email address and
Press Next 6th screen: The DrakX Partitioning wizard found etc. etc. 
- If you have your partitions already made: tick the box "
use existing partitions" and
Press Next - If you still have to make partitions, or want to change the size of the existing ones: tick te box "
Custom Disk Partitioning" and
Press Next You will be taken to the very intuitive and easy partitioning tool.Make a 4G partition for / and a 2G for /home.
7th screen: Choose file Mount points 
Chose the partitons where you want / and /home and
Press Next ( Everybody using partitions for /tmp and /usr too . . you know what to do

)
8th screen: Choose the partitions you want to format 
. . .all boxes have to be ticked and
Press Next 9th screen: Packages 
Do like in screenshot, tick all the boxes on the left, and only the last 3 on the right and
Press Next NOTE: Including Gnome will also give you all the gnome programs you can also use in KDE . . so even if you intent to never use Gnome it is better to install it anyway.
NOTE: in some cases, additionally checking the box "individual packages" and adding: kdegraphics-kdvi, koffice, xpdf, gimp data-extras, mplayer-ui, xine-ui, xmms, xmms-alsa, kdeadons, kget, xterm, bash-completion, kedit, usbview, kdeedu and nmap-frontend somehow corrects some little bug in the installer Now the install really starts it takes about 16 minutes and you have to change CDs twice 10th screen: Root password, Fill in your rootpassword twice and
Press Next 11th screen: Adding User, fill in name twice and password twice and
Press Accept 12th screen: Adding another user,
Press Next 13th screen: Auto login, . . de-select the box, you do not want this, and
Press Next NOTE: It is safer to not use this feature, and it makes that you can choose at boot what windowmanager to start. Also if you ever get a corrupted /home directory the non-autologin makes fixing a lot easier.
14th screen: Boot loader,

Select "
First sector of drive ( MBR )" and
Press Next NOTE: It will automatically include your Windows partition for dual boot
15th screen: Summary, . . . . This is very important . . check all the settings, look at the difference I have in the two screenshots:

Before configuring
http://home.wanadoo.nl/onurb/ftp/INSTALL_10/DrakX-screenshots/9.png After configuring
16th screen:Updates . . . say yes and
Press Next NOTE: This feature rarely works, but still it is worth trying . . you will still have to do the updates in the MCC after the first reboot
18th screen:Complete . . remove your CD and
Press Reboot After reboot install Anacron and get the updates see
this thread and subscribe to it and get notified as there are new updates posted.

BrunoPS: If you are installing the PowerPack, or are getting errors during install: see
This post in a thread where AbeL did a successful re-install after getting strange errors the first time.