I need an assignment dialog that is similar to what is built in; some fields will stay and others will be replaced. Recurrence is needed. It seems that I can either create my own dialog or customize the built in dialog. I'm not yet sure which way to go, but the second option seems like less work.

All links I have seen on customizing the built in dialog don't work. Can someone point me to information on doing this?

If I create my own dialogs, will I be able to use the appointment prompting? Or will I need to handle that as well?

I have a related question which may also affect my decision on which method to use.  Can the built in appointment and recurrence dialogs be translated?  Will they respond to change in culture and language in the operating system?

Thanks!