Steps to do in project system with investment management

Hi All,

Can you please tell me basic functionality of SAP PS with investment mangement?

I have gone through purpose through various links.

But I want to know...how to use it as end user means basic steps ?

Also there are some budget profile , planning profile, status profile maintiained in program type..

All are these different from that what we maintained in Project System because transaction code are different.

for ex:- project system planning profile in OPSB while Invest.manag. planning profile is OIP1

It is creating some confusion..

If it is different , then how we use it in PS and how it is different from PS planning profile..

Like this other things are different..

Can someone tell me the basic process from starting ...means how to create project with invest. manag.

There is one more requirement . AUC will create automatically when wbs get released?

Thanks

Rahul