SAP xMAM 3.0 Customizing Introduction

Hi all,

I need to get to know a lot of the SAP xMAM-system.... although it is more or less dead. Using the search function I have found some questions on that before but most of the posted links don't work anymore and I didn't find any substitues.

So can you please tell me where to find good information on SAP xMAM 3.0, especially on the customzing within the backend. Perhaps some good PDFs?