Debian Configuration :: Securing My Installation ?

Recently I have installed Debian Squeeze amd64 on my home desktop. I have used the standard installation method using DVD. I use my desktop primarily for web surfing, playing games and web application development. I do run apache2 and mysql servers on my system as need arise. I have been told that apache2 server execution without mandatory access controls such as apparmor or selinux makes the system vulnerable.

I could not find apparmor in synaptics, so I choose selinux for this task. To start with I installed identical environment in virtual box and tried installing selinux as given in url [url]. After the last step i.e. after running command selinux-config-enforcing and reboot I get login screen, I choose username and enter password. Thats it. The screen becomes blank and no further progress. I am not sure where did I went wrong. I am also curious whether selinux is really required in such cases or there is any better way to handle such situations. I also thought of running apache2 service from virtualbox. But I did not find it suitable for my requirement though.