GRUB2 boots to Windows 7 by chainloading the BCD. BCD is usually is installed in the System Reserved Partition without drive letter.
Partition 1 - Ubuntu & GRUB2 bootmanager installed, Primary Partition 2 - System Reserved, Contains BCD/Windows BootManager, Primary Partition 3 - Windows 7 Home, Primary Partition 4 - Windows 7 Pro, Primary Partition 5 - Windows 7 Ultimate, Logical
When booting into Windows, it should work as
MBR -> GRUB2 -> BCD(Windows Boot Menu) -> Selected Windows 7
However, I would like add menu entries in GRUB2 that boot directly into a specific Windows 7.
MBR -> GRUB2 -> Selected Windows 7
(I had read about the add custom menu entries in GRUB2 blog, but all it does is make it load the Windows Boot menu) Is that possible?
The way I see the only way to make it work is to install multiple BCD on different partitions with each BCD containing only ONE Windows 7 entry. And then tell GRUB2 load to different BCD on menu entry select.
MBR -> GRUB2 -> BCD(Skipped Windows Boot Menu due to one entry) -> Selected Windows 7
However, the BCD could only be detected on Primary Partitions, so that won't work on the Windows installed on the logical partition. Is there a way to get around this?