How to use the 3 rar files before fastactivate

Hi,
The last file of automatic install map 945 is down so I try the manuel install with fastactivate.
I have 3 files :
- file France_945.6174_Installer.part1.rar
- file France_945.6174_Installer.part2.rar
- file France_945.6174_Installer.part3.rar
Perhaps I have toextract them in a same folder but several same files are on the 3 rar files...
I don't understand what I have to do with theme before using fastactivate.
And what about meta.txt ??
Thank you for your help

You do a right click on part1 and select to extract with Winrar.
All other files be automatically unpacked.
Copy the map folder to the TT and use the update function of FastActivate before proceeding as usual.