For the Windows installer to configure the user's sc.ini to make win64 work automatically to following simple things need to happen:

1. dmd pull request must be merged: https://github.com/D-Programming-Language/dmd/pull/2667

2. Walter must switch the distributed sc.ini to this: http://d.puremagic.com/issues/show_bug.cgi?id=11266

3. installer pull request must be merged: https://github.com/D-Programming-Language/installer/pull/22


I've posted here asking for help testing all of this: http://forum.dlang.org/post/ebrbcdmsothbutakrzsn@forum.dlang.org

(curl support will have to wait until we break out stuff into lib64 which I doubt is going to happen before 2.064)