aMember + 1SC + Joomla

Looking at aMember for a project with Joomla and 1SC.

I've got two scenarios I'm hoping for...

SCENARIO 1: Free Membership via Opt-in Form

The scenario I'm looking at is for a free membership which
will look/act like a regular simple opt-in form requiring
only name and Email address.

Is it possible to have a SINGLE opt-in style registration
page that:
- acts as the 1SC opt-in form,
- creates the appropriate aMember user
- creates the Joomla user (via aMember's Joomla plug-in)?

SCENARIO 2: Paid Membership

For paid memberships, I'll use the 1SC/aMember integration...
user will buy the membership through 1SC which sends the
result back to aMember to create the user in aMember.

Can this also create the Joomla user is the correct Joomla
group (using Joomla's JCL plugin)?

Scott