partition shrink fails without error; could it be missing BOOT.INI ?

After shrinking my primary healthy NTFS boot partition using Acronis Disk Director, the old size still shows when I go into Window's Computer-> Manage-> Disk Management.
So I assume the resize has not taken effect.

Ever since I first purchased it new about four years ago, my XP computer has displayed an Invalid BOOT.INI message on startup, yet it has always booted up fine.

This command:

Start -> Run : C:\boot.ini

raises an error that boot.ini cannot be found.

Since I belong to the if-it-aint-broken-dont-fix-it school, I did nothing about it. However, my goal now is to turn the XP system image into a VHD using DISK2VHD, and bring it up as a Virtual PC under Windows 7 on my new PC. (That's why I am trying to shrink the partition because I read it cannot be larger than 127GB.) Before creating the VHD, I'd like to repair the missing BOOT.INI.

However, I cannot put my hands on the Windows XP Pro Startup Disk. I think my house must have a troublemaker poltergeist, because it is only the things I really, really need that seem to go missing. Why don't the piles of junk ever disappear? QED.

I have a single disk with a single active healthy NTFS partition, and only one O/S, namely XP Professional (full retail version). I have the product key saved in an online vault.
Can I simply save the following text file (from this MSFT KB article: http://support.microsoft.com/kb/289022) as BOOT.INI in the root of C drive?

[boot loader]
timeout=30
default=multi(0)disk(0)rdisk(0)partition(1)\WINDOWS
[operating systems]
multi(0)disk(0)rdisk(0)partition(1)\WINDOWS="Microsoft Windows XP Professional" /fastdetect

Thanks for the help!!!