[wp-hackers] Rename the wp-admin directory

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Hi list members,

I stumbled upon this Q on WPSE<http://wordpress.stackexchange.com/questions/43560/how-do-i-rename-the-wp-admin-folder-with-the-admin-url-filter#comment55078_43560>. 
I found it interesting, but never tried it myself, so I have no starting 
point to help this guy. 

1) Is it actually possible to change the /wp-admin directory name?
2) Is it the correct way he's trying it?
3) Where should he start debugging?

Best wishes,
Kaiser.


*) I'm the 2nd guy in the comments.