Hi Mani,
1.You can create any order type with KOT2 .
2.Create settlement profile in OKO7 here mainly define and assign it to order type in KOT2
-Allocation structure
-Default Object Type(Cost Center) and valid receiver (cost center )
2.Create Allocation structure in OKO6 and assign in settlement profile Here you define settlement cost element as Cost center
Regards
Prasad