Assets related to the Client

Hi All,

As per my organization's current scenario we are purchasing the assets instead of client (like laptops & Iphone) related to the client and billed them at the time of client billing.

So any body can tell me how to maintain this in SAP System, is there any entry which has to be made at the time of creation of asset master record, and what are the entries while performing creation of purchase order, MIGO & MIRO.

Regards

Ankur