Your tutorial is extremely long-winded and, honestly, convoluted.
This tutorial is what I'm referring to:
http://wololo.net/talk/viewtopic.php?p=410121#p410121
You basically obtain the PKG files for the PS1 games from Media Go, copy those PKGs somewhere safe, then install them on your PSP using Media Go as well. Once that's done, you can access the licenses from the PSPs file system to your PC, install those PKGs you copied from Media Go onto your Vita using the PKG Installer and QCMA (in IDU mode, outside it won't work), then transfer the license files from the PSP that you copied to the Vita's PSPemu folder.
It's how I got the Spyro trilogy on my US PSN Vita when Henkaku first released, and it still works just fine now.