Maybe someone likes this: I have made some changes to the default enhanced-skin for DA. Now there is under "Webmail: Squirrelmail" and "Webmail: UebiMiau" also "Webmail: Horde" and the Webmail-link at the top of the page (near Home) is linking to /webmail.
Also if u use SSL for DA the webmail links and phpMyAdmin link isn't linking to
https:// anymore but just to
http:// (
https:// was giving me some problems).
The "Webmail: <client>" is linking to the direct login-page. As I said: The Webmail-link at the top of the page is linking to /webmail. I have made a simple page there with three logo's (for SquirrelMail, UebiMail and Horde), simply link them to /horde, /squirrelmail or /uebimiau and it's working

.
Other things you have to do:
1) Make sure squirrelmail is installed in /var/www/html/squirrelmail.
2) Make sure UebiMiau is installed in /var/www/html/uebimiau
3) Make sure Horde is installed in /var/www/html/horde
4) Make sure phpMyAdmin is installed in /var/www/html/phpMyAdmin.
Edit your Alias settings in httpd.conf and make sure they are pointing to the good dirs, mine looks like this:
#Start DirectAdmin Settings
Alias /config /var/www/html/redirect.php
Alias /phpMyAdmin /var/www/html/phpMyAdmin/
Alias /phpmyadmin /var/www/html/phpMyAdmin/
Alias /webmail /var/www/html/webmail/
Alias /squirrelmail /var/www/html/squirrelmail/
Alias /uebimiau /var/www/html/uebimiau/
Alias /horde /var/www/html/horde/
Then login to you reseller panel and go to the skins, upload the .tar.gz I have added to this post, after installing select the new enhanced skin and click on "Apply to me". Test if it's working, if it's not, change the skin-setting for your account in /usr/local/directadmin/data/users/admin/user.conf (where admin is u must set the username you are using). If it's working then you can click on "Apply to all users". If u wish u can remove the old enhanced skin, and rename the .tar.gz to "enhanced.tar.gz" en upload again as "enhanced", then select and click on "Apply to all users", now you can remove enhanced_new.
I will make this for the default and power_user skin also in the next week. I hope someone likes it

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EDIT:
I also finished the other skins (power_user & default), download the ZIP-file and extract, you will have 3 modified skins

. I have also made some changes to enhanced.
EDIT 2: I have deleted the modified skins from this post because I made some changes and i'm sure I will do this also in the future. You can download the most recent version now from:
http://www.directadmin.com/forum/showthread.php?s=&threadid=8804.