Ok, here is prefered way of installing rotation into diablo.

Why? Because all these packages are from diablo, not from chinook. I recompiled all of these using diablo sources, libs & SDK.

And also, you are using a chinook kernel in diablo. Works but if you can have the diablo one (which is better, why not)

1. Unzip this to your memory card: http://qwerty12.maemobox.org/Rotate.zip

(thanks andrewfblack again)

Edit, mirrored, thanks rm_you!
http://www.ageofikon.info/Rotate.zip or http://cs.trinity.edu/~acm/debs/Rotate.zip
2. Set the tablet into red pill mode: http://maemo.org/community/wiki/appl...erredpillmode/
3. Install the packages in this order:

• libxrandr2_1.2.1-1_armel.deb
• xserver-xomap_1.3.99.0~git20070321-0osso20074202_armel.modfied.deb
• rotate-sb-plugin_0.1-1_armel.deb
• kernel-diablo-flasher_2.6.21-200823maemo3_all.modfied.deb

4. Open up "X-Terminal" and run flash-and-reboot.
5. Enjoy.

NOTE: Emjayes's sliderotate was updated for Diablo and provides an automatic way to do this:
http://www.internettablettalk.com/fo...&postcount=149

Highly recommended.

Here is my rotate-sb-plugin mod (original by jott) to rotate the d-pad too.(Well, I say mine but the original idea is Benson's and pH5 helped me with execing a program in a .c and I just did the rest and packaged it up ):
http://www.internettablettalk.com/fo...&postcount=219
The rotate-sb-plugin in Rotate.zip is the original.

If packages are missing or/and you get something like:
http://www.internettablettalk.com/fo...&postcount=223
Then try first:
http://www.internettablettalk.com/fo...&postcount=224