NTI CD Maker 7.5 - Can I overburn data (not audio) CDs instead of spanning?

Hello. Basic question up front that may render the rest of this post moot:

In NTI CD Maker 7.5, is overburning supported for data CD (not audio) projects?

If so, here's the deets of my problem.

I have a CDRW drive that supports overburning, and NTI CDMaker 7.5 recognizes and reports that it does.

I have enabled Overburn under the Tool - Options - Overburn tab and set the limit to 90 minutes. I am using 80 minute CDR blanks.

Whenever I add more than 700MB to my CD data (not audio) project, CDMaker immediately wants to perform disc spanning and use two discs instead of allowing me to overburn on one disc.

When choosing to Burn, I am asked to confirm I want to write my data to 2 700 MB CDs. If I say Yes, only the first 700MB is written and the second blank disk is then requested. If I say No, the Burn process is canceled.

When doing the same with more than 700MB of audio data for an audio CD project, I DO have the option of overburning.

How do I overburn instead of span for non-audio data?

Thanks!

Follow up - data overburning not supported in NTI 7.5 per tech support.