extraSignUpFields - is there a plain label option?

[pmcochrane]

Hi. Working my way through user registration for a system. I would like to have a group of check boxes for the user to request what features they require for the new user. A radio box is not suitable as it can be one or more choices.

I've implement a series of check boxes as extraSignUpFields to do this but I've come across a few glitches which I hope you can answer:

1. Is there a way to add a general label as an extraSignUpField as I would like a label above the list of checkboxes (each checkbox will have it's own individual label)?
2. Can the checkbox list be placed inline as for a radio list (so they don't appear vertically)?
3. This is unlikely but is there a way to ensure that at least one of the checkbox is selected. I think this would have to be checked in Accounts.validateNewUser

Thanks for any help in this.
Paul