4.2.2 Stock ROM for Samsung Galaxy Trend Lite (GT-S7390)

Hello XDA forum,

I was wondering if this will work and that it's not some scam site?:
http://downloadstockrom.com/samsung/...-lite-gt-s7390

I wanted to install apps on my external sdcard but it didn't work with Android 4.1.2, maybe it's because of my phone being old/not compatible.
I've tried several methods to no avail, this will be my last try.
Any kind of information would be much appreciated :)

Thanks in advance!