Loading Account Groups for PCA reporting

We maintain account groups for PCA reporting in R/3 via tcodes KDH1, KDH2. Originally, we created these from our Financial Statement version in FI with Tcode KE5B. After they were originally created, we have to maintain them in both places, FI and PCA.

Moving forward with BI, I obviously do not want them managed in a 3rd place. I'd like to be able to load them from R/3. In business content, there are account ranges for items like Inventory and Assets which are created as variables on the GL account characteristic.

My question is this: Can these variables be loaded/created from R/3 data? Is there another method for defining account ranges for balance sheet lines such as inventory, etc. in a master data load?

Thanks in advance

rodney