So here is a question and I hope it can be done. I have a check box field that, if selected, I want to add a new tab to the profile while the person is registering (ajax possibly), and at any other time can be modified.

And just in case, yes, the tab would be hidden unless this check box is selected. This is what I would like to do:

1. User signs up for website, and then starts the registration and profile.
2. If check box selected, show tab Softare
3. Collect information on Software tab, allow user to modify some (but not all) fields.

Thanks in advance.