I found this Question asking »How to change the wp-admin folder name« and had a long time in the comments. The outcoming was, as Dion Hulse stated on wp-hackers, that it's simply not supported, has a lot of caveats, etc.
Now the OP thinks that his Q is solved (added
FIXED to the title, which I removed). How should we handle this Q? Delete it - I already flagged it?