1 Go to Livejournal and click on Manage, and then go to Customize.
2 You need to use S1, the old style system, to configure your lj, so click on Modify Journal.
3 Scroll down all the way until you see the overrides box.
4 Add the following code into the box:
GLOBAL_HEAD<=

<=GLOBAL_HEAD
5 Any CSS codes to customize the style of your page go in between those two tags!