Custom PHP Code in vBulletin Forum and CMS

[fightgenossen]

Hey Folks

Im just looking for a Way to include on the Main index.php some PHP Code.
I found some Examples at Google and all talking about Hooks, but no example worked for me.

In Example: i want to Show a Div with PHP Code on all Pages (Forum, CMS, Sublinks....) on the left Site of the Page.

Does anyone have a good Step by Step Example to create and include/apply a Hook which contains PHP Code to show this Hook at every Site on my vBulletin?

Thank you very much and sorry for my Bad English

Best Regards
oNdsen

Edit:
I forgot to tell which Version i use in vBulletin Its vBulletin 4.2.0 Patch Level 2