Conditional user registration profile field?

[mmdlcab]

Sorry if this has been posted / asked / answered before? I'm a total newbie to VB. I am still searching through all the forums here.

In my setup, I'm going to need to have, during the new user registration process, some kind of conditional processing based on a yes / no answer to a added radio button. If the new user answers yes, they have to fill out 3 other additional fields, if not, they bypass those 3 fields.

I thought this was something that would be simple to do but it looks like it needs a mod or manual coding. I know I can't do the coding. Anyone out there know of a mod that might do the trick? Or another suggestion?

The basic flow I need is:

...registration questions...
Are you a member of our league? (user must answer question)
() Yes
mandatory field 1
mandatory field 2
mandatory field 3
() No
...registration questions...

thanks in advance
cab