I still have my DigiLE on my system and use it occasionally. PPro doesn’t support the Digisuite(capture/RT playback) but it will import Matrox files and render them. The results aren’t great however.
What I typically do if I need to source from BetaSP is bring the footage in thru Digitools or Premiere 6.5 and then use After Effects to mix formats and then create your master file for DV (PPro), or to a Digisuite MJPEG file for layback from Premiere 6.5.
Greg