Field Level approval

Hi

We have field level approval requirement like

Suppose for vender Master there is some 240 fields which classified as Sensitive fields (May be 15) and remaing as Non-sensitive fields.

For creation there is no porblem and it goes to 2 level approval process.

But for change we need if changes made from sensitive fields we need approval but not for non sensitive. It goes directly for activation.

I know we add addfield in BRF Plus application but it is OK to add one/two fields not 15 fields.

If I maintained Z table for that 15 fields with workflow step number along with mulitple company codes how can I use it in BRF Plus workflow for approval purpose?