XP script suggestions!

Does anyone know if the https://neverwintervault.org/project/nwn1/script/pwfxp-20-flexible-xp-distribution-system is with the shayan subrace system? I saw that shayan has also its own XP system but been contemplating to using the PWXP system.

SO I decided to give the PWXP system a go but I just wonder how it works with ECL? Anyone got some experience with this system?