Never tested Voice Over ...
The thing with the resizing partition: the partition scheme has to be GUID, the resize thing you do it from Disk Utility. Does not resizes NTFS partition, only HFS or HFSJ.
To make a partition active from mac you have the Terminal instructions here or simply use OSx86 Tools Remember that the latest version of OSx86 Tools have another interface that does not alow to select the EFI partition. Use this version if you like just hope that PCWiz, THE COPYRIGHT OWNER will not be mad on me because i send you back to an older version of his product.
hah =) I just forgot that now I'm using GUID... on my previous mac Disk Utility can't resize anything. Now it can. Thanks.
So... It seems that all problems solved, except wi-fi (which not nesessery at this moment) and shutdown (it's annoying, but not much)