A while ago I downloaded the RD file hosted here at PG Music and modified it to suit my 700GX. You are welcome to a copy if you think it would be useful (PM me your e.mail and I'll attach it to a reply). It took me a while to modify the original, but now it works great in BIAB. Only thing is, for the higher bank patches they appear in a list as opposed to catagorised in a drop-down, though this is not much of an inconvenience really.

You mentioned Dimension earlier: have you got this working with BIAB? I also use Sonar 7 PE which includes Dimension LE, but I haven't really tried to get it working in BIAB. Presently I am using TTS-1 in BIAB as my GX is with Roland for a some warranty work, and would be interested in getting Dimension LE into BIAB if that is possible.

Though the higher bank patches on the new RD's are of great quality, they are quite limited in number.