Remix:
Download ImageWriter, download remix from ubuntu's site and create usb bootable stick.
Skype:
Install 2.1.1 Beta version for support of video.
Installing Flash:
Go to YouTube and click a video, then get the link to install flash and peak adobe's version. Then run the fixing script for flash.
Installing Firefox 3.5:
Use Synaptic Packet Manager, change file association to start firefox 3.5 by ln..
Installing the Citrix Presentation Client:
http://techxplorer.com/2008/11/07/installing-the-citrix-presentation-server-client-on-ubuntu/