I was afraid you’d mention templates, until now I’ve always tried to keep away from them as they don’t feel intuitive to me, but that’s my own issue I guess – and now that I’ve wasted hours playing with templates, I think I finally got it and it was way easier than I thought… 😉
Anyway, for future reference, in case someone also wants to build something similar, what I’ve now done (field names and IDs should be adjusted obviously):
– added a non-mandatory custom field to the registration form called NAMELIST as a checkbox with value YES, default empty
– created template #1 with [eme_if tag="#_FIELD{1}" value="YES"]<|li>#_ATTENDFIRSTNAME<|/li>[/eme_if] (remove | from tags)
– added the template to the event page with [eme_bookings id=#_EVENTID template_id=1]
Now, whenever someone visits the registration page, there is a list of already registered users that have NAMELIST set to YES.
Not sure if that’s the solution you have proposed but it works ;D