Installing the New Virtual Machine and XP Mode in Win7x64 on the Intel 2x E5-2620 Architecture (12 cores, 24 cpus)

Question

I have been hibernating quietly at school with an Intel Core Duo T7300 on XP, and have been insulated from the madness of multi-core processors.  I gather that there were problems with installing the XP Virtual Machine on Vista under Quad architectures,
but that these eventually got resolved in 2009.
The newer problem is concerned with installing the XP Virtual Machine on Win7x64 with greater than four cores in the cpu architecture.  Others have mentioned this problem over this past Summer 2012.  The problem is that at the very last step of
the complete install, Win7x64 reports a failure to install the XP Virtual Machine, and with no further comment.
Apparently KB/2519949 gave a temporary (MSFT qualifies this as "temporary") hotfix solution to this problem for AMD 8-core chips in the Bulldozer series.  However MSFT cautions that this problem requires further research.  This was earlier
this Summer 2012.
My problem is that I have an Intel 2xE5-2620 duo-processor cpu architecture (2x6=12 cores, 24 cpus in Windows).  The cpu architecture is both Intel, and with far more than the old standard of four cores.  The XP Virtual Machine in Win7x64 will
not install, as described above.
I have an armload of new 64-bit software all of which has installed pristinely in Win7x64 under this 2xE5-2620 Intel architecture.  However, I have one very important piece of legacy (latest version incompatible beyond XP type of legacy) technical writing
software that is critical to my PhD thesis.  In need the XP Virtual Machine for this, and I have no idea how to get it.  My PhD thesis supervisor also needs this particular piece of "legacy" technical writing software for his new book on Probability
Theory.
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Answer 1

I have news about this issue with XP Mode on Workstation machines.  I have actually known about this for a couple of months, but it has not been until these Christmas 2012 holidays that I have had a chance to follow up with an implementation. 
In review, I purchased a Workstation computer for scientific computation purposes this past August 2012.  My chipset is an Intel 2x E5-2620 for a total of 12 cores, and it turns out that this was not the problem for XP Mode.  My OEM shipped this
machine with Windows 7, but without XP Mode, and there is a reason why.
As an aside, it should be mentioned that the main line MSFT OS, Windows 7 or 8, is what I want for this machine, and not Server 2012.  The reason is that most of the scientific computation and technical writing software that I use is written only for
Windows, and not for Server.  Then also hopefully Hyper-V can do in Windows 8 most of what XP Mode is doing for me in Windows 7.
My dealer was able to tell me, when he got back from holidays in late September, that the reason that XP Mode failed to install on this Workstation, and the reason it was not included by the OEM, was that the original HDD configuration was for RAID (3 available
bays) and formatted for drives of at least 1TB in size.  Although the original HDD installation was only a single HDD with only 500GB, the machine was equipped to have something much larger installed.  But this format excluded the possibility of
XP Mode.
So we changed the hard drive installation to something that I preferred.  We installed Windows 7 on a 480GB SSD, and I installed all my software on this drive, as well as all my important data.  Most importantly, since this drive is less than 1TB,
we could use the MBR format which allows XP mode.  Then we also formatted the original HDD of 500GB in MBR, and decided to run it with Intel RST.  This second drive is for unimportant data, and large files.  For backup we chose a 2TB USB 3.0
external.  In this setting, installing Windows XP Mode was easy, as the only thing we needed to do was modify BIOS to enable virtualization which was part of the Intel 2x E5-2620 chipset already.
I am very pleased with XP Mode. The scientific writing software for my thesis that I was worried about does actually run in Windows 7 under compatibility mode, but there have been some huge advantages to installing in in XP Mode as well. I still have licensed
copies of Office 2003, Acrobat Pro 9, and MathType 5.2, and other old software as well. I now have all new software, for example Office 2010 (64-bit), Acrobat Pro 10 (32-bit for 64-bit), and MathType 6.8 (64-bit), and lots of other things. However, now that
I have my scientific wrtiting software (for which the maker has not caught up with Windows Vista/7) installed in XP Mode, I have also installed WORD 2003 with MathType 5.2 in XP Mode. My scientific writing software can translate WORD 2003/MathType 5.2 in RTF
format to LaTeX. So lets hope these guys eventually catch up with Windows 7 and 8.
I am also using XP Mode to archive a large block of my old data from the XP days. I still have licensed copies of the out of date software. And I would rather not update every single old file I have to a current format. So altogether, XP Mode is working
out quite well.  It is very fast with my Intel 2x E5-2620 and maximum RAM.
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