New Pricing type when creating Sales Order

Dear All Gurus,

Need to create a new or Modify existing Pricing type in Sales Order. But can't figure out the procedure. Below are the exiting values for Pricing type. How do we create/modify this Pricing Type.

A Copy price components and redetermine scales

B Carry out new pricing

C Copy manual pricing elements and redetermine the others

G Copy pricing elements unchanged and redetermine taxes

H Redetermine freight conditions

I Redetermine rebate conditions

J Redetermine confirmed purch. net price / value (KNTYP=d)

K Adopt price components and cose. Redetermine taxes.

M Copy pricing elements, turn value

N Transfer pricing components unchanged, new cost

O Redetermine variant conditions (KNTYP=O)

R Apply Price Parts and Bonus Conditions

U Redetermine precious metal conditions (KNTYP=U)

X Customer reserve X

Y Customer reserve Y

Z Customer reserve Z

1 Customer reserve 1

2 Customer reserve 2

3 Customer reserve 3

4 Customer reserve 4

5 Customer reserve 5

6 Customer reserve 6

7 Customer reserve 7

8 Customer reserve 8

9 Customer reserve 9

S Ship & Debit (IBU HiTec)

Thanks