One possible way to remove the validation of the email field is to drag a Registration Widget
to the Page and edit it (the Registration widget is under the Users group). You need to find the ValidatorDefinition
under the email TextField and remove it:
Title="<%$ Resources:Labels, Email %>" CssClass="sfregisterField sfregisterEmail" WrapperTag="li">
After you save the widget you will be able to register a new user without need to add any email in the Registration form.
As per assigning usernames - you can find the "userName
" TextField and customize it as shown in this forum post
Please let me know if this was helpful.
the Telerik team
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