Has anyone tried "Ice Cream Bread" yet?
I'm with alitria. I'm pretty sure Bisquick contains some kind of shortening-type product, and it wouldn't work as a sub for SRF. Which shouldn't be hard to find, if you were inclined to buy some, but is even easier to fake, as alitria said.
The recipe sounds bizarre in sort of an intriguing way . . . post back if you make it!