php 5.4.28 - 5.3.x downgrade

[skyline]

hello
vestacp Version 0.9.8-9 installed php 5.4 also want to downgrade to version 5.3
How can I do?

Thanks for your help

"Translated with google translate"

[zumango]

I need to know as well.
Some of my scripts won't run with php 5.4

Thanks