No. Because of the way the dialog and string pointers are packed in, its not really possible to add extra strings with the way Flux v1.xx saves data (which mimics the original ROM very closely).
Flux v2.00 saves them in a bit more unorthodox manner, and allows upto 256 unique strings per Location. This version is currently in BETA and not available to the public. Hopefully, a release will be coming soon.
---T.Geiger