Accounting VSAs

I was wondering if it is possible to modify the accounting queries to accept our own Vendor Specific Attributes. I would like to insert the Ascend-Data-Rate attribute we receive from our Ascent (Lucent) MAX TNT machine running TAOS 11. Upon browsing the sql.conf file, my thinking was that if most of the attributes get %{} "escaped" and turned into "variables" that are inserted and modified, that VSAs would too. Upon some testing, at least in my case, I have found that this isn't true. I find that the NAS sends many Vendor-Specific lines that dictionary.ascend contains and FreeRADIUS therefore decodes, but I am stumped as to how to include these in our queries. Is here any documentation or workarounds? Thanks, Wes