With TestStand, you call that VI directly. Assuming you did not enable the "Separate From Compiled", you can call a VI directly from disk and it will run in the RTE just fine as well. What I have been doing is building my libraries into Packed Project Libraries (PPLs). PPLs are compiled libraries, so they also run just fine in the LabVIEW Runtime Engine.
There are only two ways to tell somebody thanks: Kudos and Marked Solutions Unofficial Forum Rules and Guidelines "Not that we are sufficient in ourselves to claim anything as coming from us, but our sufficiency is from God" - 2 Corinthians 3:5