RV_BELEG Number Range Buffering

HI,
We are creating billing documents in parallel from a flat file, some cases we are having issues with the locks on NRIV table while creating billing documents in parallel.

We cam across SAP oss notes 363901/840901, where we can activate the parallel buffering fro number range object RV_BELEG.

But this number range is used by multiple documents (Sales Orders, Billing Documents, Deliveries..)

I dont want to number range for the sales orders or deliveries to be buffered.

Is there any way where we can buffer only the billing documents.

Thanks
Srinivas