Postion ID role in PS/IM

Hi Team,

I need some info regarding PS-IM .

1. Purpose of Postion ID in IM.

2. Can we any name of position ID (I tried it is taking any name )

2. What happen if wbs is not assigned on postion ID.

3. Purpose of status(CRTD ) in  postion ID.

4, suppose I have created hierarchical strcutrue of postion ID and one hierarchical of Wbs in one project.

Is there any link between them ?

How the budget get transfer from IM  to PS (any code)

and last but not the least.

5.Investment program is dependent on company code and profit center ?

if yes , then how we change it(T.code) ..I am talking about investment program(IM25) not investment program defintion.

Client requirement is delete company code and profit center from investment program in IM25.

Please respond..

regards

Rahul