oga_memberdetail.jpg
If a guild member has no alts, or is an alt, nothing extra is shown.
oga_crafters.jpg
The existing list of guild crafters is extended the same way that chat is, with mains' names added by their alts.
oga_alts_remaining.jpg
Guild quit/kick messages for alts are rewritten the same way as other messages. Guild quit/kick messages for mains are augmented with the list of their alts.