To Add Two ZFields to sales order Item (Column) of VA01

Hi friends,

My requirement is to Add Two Zfields at column level of Sales order Item of VA01.

i found 8459 Screen Exit , but it will display in Additional Tab B .

And aslo I need to get the zfield values for every line item .

Example:

ITEM | MATERIAL | SERVICIABLE MATERIAL | Service type(zfield)|

10 |10000 | 10001 | Cleaning

15 |20000 |200001 | Repair

i hope u understand my query . so for each line item it will vary , i have to do the validation for all the line item fields.

Please help me Very urgent.

Thanks,

Veera...