Look under the Help menu, go to the training guides, download the
"Archicad Essentials" ITG from the GS web page. Curtain walls are not
intuitive. Also go to the AECbytes site, they have a Tips and Tricks article
related to AC Curtain walls.
Please indicate your AC version and OS in the signature line of your profile page.
i've already seen the graphisoft tutorials. but they don't really show how to create those more complex curtain wall systems.
there is no chance to split a curtain wall created by magic wand. and i don't really know how to connect or merge profiles. the straigt foreward way via design - curtain walls - combine . .. or even the split command don't work ;(