Tab Based Registration, Payment Flow, Duration

I'm using an extension/cb plugin combo, Profile Manager, so that I can have different kinds of registration forms for different kinds of users. Registration forms are tab based, allowing me to compile tabs for the registration inputs. Are the subscription options tab based?

The form generated through Profile Manager submits to the comprofiler component with the task, "saveregisters". Will CB correctly initiate the payments with this task, or does CB Subs divert CB into an alternate workflow from the registration form?

Finally, how customizable are subscription durations? Completely or just into set groups (e.g. "3 month blocks, 6 month blocks, year blocks"?)

moved from CBSubs presales area to Professional forum for quicker response.

Also, you do not appear to be a CBSubs license holder.