If your are running a Windows PC, you may have a look at http://geosheep.4fan.cz/en/GCzII-CL-Downloader , see doc I wrote in an "open" Wiki : http://geosheep.wikinet.org/wiki/Main_Page
I'm not sure it will help for multi, but it works great for description, images, logs, hint, maps ... and I hope WayPoints .
Yes, it download waypoints and show it on GCZII (and many more).
I use the downloader in the same Folder like gczii on my sd-card, so the data is up-to date without any copy-work.
greetings
Scottiefilm