My English is not very good.
I use TDM-GCC in fact, not MinGW.
I mean, to install tdm-gcc-4.5.1(Bundle Installer), there are too many files in the MinGW DIR not so tidy as "A".
"A": When I install codeblocks-10.05mingw-setup.exe, the files in "codeblocks\MinGW\"
LOL, I don't know whether you can understand~
In a word: "codeblocks-10.05mingw-setup.exe" is cool! (forget the GCC ver.)