Partition Strategy for Bitlocker

This conversation was started over here: https://discussions.apple.com/thread/4144252?answerId=22752994022#22752994022.

I run bootcamp and Parallels (the latter using the bootcamp installation as the guest OS) on a 15" rMBP with 256GB SSD. I use Win8 as the guest OS and Mountain Lion on the host. I have been trying to enable bitlocker in the guest OS and when I attempt to create another partition (required with bitlocker on a system drive) using the Win8 command:

BdeHdCfg.exe -target c: shrink -newdriveletter x: -size 1500 -quiet –restart

I receive the error:

Disk already has the maximum number of primary and extended partitions. Use the

'-driveinfo' command for a list of valid target drives.

This of course is related to the issue originally noted in this thread about hybrid MBR as I already have all four allowed partitions. It looks like there may be a way around this using some of the techniques described in this thread however rather than creating another partition visible to OSX (which is what OP did) I want to create two partitions visible to Win8. Would someone be so kind as to walk through how I would accomplish that?

Thank you!

In hopes of increasing the Google-ability of this thread for future people with this issue, Bitlocker Drive Encryption returns the message "Bitlocker Setup could not find a target system drive. You may need to manually prepare your drive for Bitlocker." The Event Log contains the following errors in the Bitlocker-DrivePreparationTool log:

Error Code: 0xC0A00007

Error Text: BitLocker Setup could not find a target system drive. You may need to manually prepare your drive for BitLocker.

and

A volume failed to meet the requirements for a target volume.

Volume Name: \\?\GLOBALROOT\Device\HarddiskVolume4

Reason: The system drive cannot be used for the merge operation.