mobile

Hello! I have my Galaxy S4 running 4.4.2 Kitkat(Not russia)
And I want to install stock rom of 5.0.1 Russia region on it..
I9500XXUHOB8_I9500SERHOB8_SER
-------Sammobile-------
Model GT-I9500
Model name GALAXY S4
Country Russia
Version Android 5.0.1
Changelist 3943544
Build date Thu, 26 Feb 2015 11:30:40 +0000
Product code SER
PDA I9500XXUHOB8
CSC I9500SERHOB8
----------------------------

This is the one...

Well I saw tutorials on how to install it but I got confused!!
In Odin some select AP only to install... And others BL , AP, CP, CSC..!
Just different videos for installing lollipop on GT-I9500..
Which the right one people? :/
And what is the difference?
Please explain