Technical migration problem

[almoh]

Hello
so i have wow cata 4.3.4 and i want to upgrade it to 5.0.4 or 5.0.1 what ever works
but i can't do that due to battlenet which starts every time i launch ''World of Warcraft Migration Setup.exe'' so battlenet deletes all files and starts downloading wod directly
i wonder if there is any possibility to migrate wow cata to 5.0.4 without the annoying battlenet application
i have all the migration files (approx 5gb) i have them in TempMig5.0/5.0Migration-data
and also this file Temp/5.0Migration/Installer Tome 1.MPQ
ps:i don't want to redownload the whole game it would take like 11 hours

[Zelta]

In order to play in our MoP realms you will need 5.4.2.
One possibility is to overwrite all these files into your current 4.3.4. folder.

[almoh]

Thank you for your help.
But anyway i downloaded expansion3.mpq and expansion4.mpq (approx 3gb) from a post in this forum and it is downloading missing files (sound and some texture files ) in the background. However, the game works fine.