After much thinking I just fixed how to fix the install of mist of pandaria ( when you often stuck at 25% or 75%)
also when you have install problem in the launcher.
1. Download this : <Snip> ( this is a complete paste of MoP beta map )
2. Open in "Winrar" (if you dont have it, install it) .
3. Paste the "World Of Warcraft Beta" map in to your Harddrive.
4. In the map "World Of Warcraft Beta" map open "WoW.exe".
It should pop up a windows that should complete installation
I tested this, and it actually seems to be working so far. I can now open the launcher, and get into the game where i need to enter username and pass, after that i come to the servers witch tho seems to be down for the moment, wich i've also seen on the forums to... I would probably say this is working! Thanks!