wraparound cover design (possible?)

Hello Blurbians!
I just finished laying out a book using the convenient BlurbSmart software. But my cover design is a wraparound design and the only option I see in the templates is for separate front cover photo and back cover photo.

I see that they offer that style (or option if you want to call it that) in thier Adobe In-Design plug-in. I don’t have that software….. I don’t want to learn a new software, and if I did, I don’t want to redo the whole book since I’ve already laid it out in the Book Smart template.

Are there any options that I may be missing?

I understand that I can "cut" my image in half and make one part the front and one part the back, but as the design sits now, it would break up the linear flow to have the spine graphic-less.

I hope one of you master Blurbers has a solution.