How to install Win 7 to a MBR partition

I am trying to set up a dual boot system:

I installed Win XP on the primary partition and when I tryed to install Win 7 on the seconday partition I get this error:
The selected disk has a MBR partition table. On EFI systems, windows can only be installed to GPT disks.

Is there any way that Win 7 can be installed in a MBR secondary Partition. Win XP is installed now in a MBR primary partition.

My searches show that Win 7 has to be installed in a GPT partition and that I have to format the complete hard drive, convert the hard drive to GPT, and start over with the Win XP installation.
Is this true?

Thanks for your help!
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noxchoGlobal Support CoordinatorCommented:
Actually you need to go to BIOS and turn there off the EFI boot mode. Since then it will install on your MBR partition. And it is strange that XP did install under this mode.
dave_skyAuthor Commented:
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