Short answer Scotty, Steven is right: Splicing no (as far as we can ascertain). Stitching, yes (on some ropes). It's knots all the way!
During the day our rope experts have given us plenty of reasons why dynamic ropes cannot be spliced - mostly in technical jargon so I will not even try
to repeat it on these pages. Suffice to say the simple answer is NO they cannot be spliced.
A careful balance is required during the construction process to ensure the resulting rope will catch a fall with minimal impact, yet not be so stretchy that it allows the falling climber to hit the deck!
All of this means complicated parallel core construction etc, etc making it difficult if not impossible to splice.
Beal and Edelrid offer stitched solutions but no one in this part of the world can provide such a service. Given the custom size requirements for footlocking strops, factory stitching does not appear a very practical solution.
Treetools will post more on the dynamic footlock strop issue over the next few days.