DIY  ubuntu to adjust your requirement

When you download file with .rar suffix,you should extract it use unrar command.
1.apt-get install unrar

Ubuntu7.10 Gusty has not installed flashplugin for mozilla web browser default,so if you want to watch video from youtube or youku,please install it.
2.apt-get install flashplugin-nonfree

Install a opensource code dictionary to look up words which you can't understand exactly.
StarDict is very well.
3.apt-get install stardict
Default,it has no dictionary file,go to the following website to download:
Computer Aspect:
http://blogimg.chinaunix.net/blog/upfile/071030005804.gz
Chinese To English:
http://blogimg.chinaunix.net/blog/upfile/071030005154.gz
English To Chinese:
http://blogimg.chinaunix.net/blog/upfile/071030005439.gz
Extract the compressed file and copy to '/usr/share/stardict/dic' directory.
If you want to StarDict pronounces when it looks up words,just go to http://www.sourceforget.net
to download TTS .wav files.
 WyabdcRealPeopleTTS.tar.bz2
Extract it and copy to '/usr/share' directory.
Then restart StarDict application.

Install media player including windows platform decoder.
4.apt-get install smplayer mplayer win32codec
Tips:
smplayer is a front GUI of mplayer.
win32codec package is just for decoding various types of file based on windows.

Now,enjoy your ubuntu.
Thank you!
By creatory.