Ah, I'm sorry, I understand what you were saying. "Nope" meant "use them unfactored". Obviously I can't speak for your company policy and conservatism is to be applauded. But I think JAR-OPS 1 permits the values to be factored:
Appendix 1 to JAR-OPS 1.430 (h) Conversion of Reported Meteorological Visibility to RVR
(1) An operator must ensure that meteorological visibility to RVR conversion not used for calculating take-off minima, Category II or III minima or when a reported RVR is available.
Note: If the RVR is reported as being above the maximum value assessed by the aerodrome operator, e.g. “RVR more than 1 500 metres”, it is not considered to a reported RVR in this context and the Conversion Table may be used.
(2) When converting meteorological visibility to RVR in all other circumstances than
those in sub-paragraph (h)(1) above, an operator must ensure that the following Table is used:
Planning minima don't fall under para 1, so I think you can use the table according to para 2