Setting my Ubuntu

I decided to move from windows to Linux world. After I installed the Ubuntu, there come several problems and I posted the answers as follows:
1. Acrobat Reader
acroread is conflict with SCIM. So modify the starting script:
/usr/lib/Adobe/Acrobat7.0/bin/acroread
by adding the following setting:
export GTK_IM_MODULE=xim

2. Setting SCIM
1) Open system to install the support package corresponding to
the language you want to input at:
System>Administration>Language Support
2) then log out (System>Quit>Log Out), and login again, now SCIM
can be used in some sessions
3) gedit ~/.scim/global
add or modify the line (not forgetting you need to add the full
name reported by `locale | grep LANG= after LANG=` ):
/SupportedUnicodeLocales = en_US.UTF-8,en_GB.UTF-8
4) Log out, then log in and you should be able to use SCIM input
in every application

3. Set Default Application
1) Right-click on a file of the type you wish to set a default
application to open it with
2) Select Properties
3) Select the Open With tab
4) Select the application you want associated with that file-type and OK