Hello Michael,
yes, I forgot to check the Global Search engine. It really works, that is exactly what I was looking for.
I was trying to find the entry point from here http://help.sap.com/erp607 clicking on Application Help SAP Library English and then clicking on SAP ERP Central Component but I didn't find anything about Identity Management here.
Thank you very much.
I landed on the 4.5 documentation entering in google "profile generator sap online help". That was the first result I got.
With best regards,
Robert