Here are approvals from Harlan Carvey and David Kovar to use their code and release it as GPL:

Date: Wed, 18 Apr 2012 14:58:36 -0700 (PDT)
From: Harlan Carvey <keydet89@yahoo.com>
Reply-To: Harlan Carvey <keydet89@yahoo.com>
Subject: Re: [log2timeline-dev] Re: minor license issue in log2timeline, wrt AnalyseMFT
To: Kristinn Gudjonsson <kristinn@log2timeline.net>,
  "log2timeline-dev@googlegroups.com" <log2timeline-dev@googlegroups.com>
Cc: David Kovar <dkovar@gmail.com>

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You can go ahead and release the code GPL v2+=0A=A0=0A---------------------=
---------------------=0AHarlan Carvey=0A"Windows Forensic Analysis"=0Ahttp:=
//windowsir.blogspot.com=0A------------------------------------------=0A=0A=
=0A=0A>________________________________=0A> 

...
<html><body><div style=3D"color:#000; background-color:#fff; font-family:ar=
ial, helvetica, sans-serif;font-size:12pt"><div><span>You can go ahead and =
release the code GPL v2+</span></div><div>&nbsp;</div><div>----------------=
--------------------------<br>Harlan Carvey<br>"Windows Forensic Analysis"<=
br>http://windowsir.blogspot.com<br>---------------------------------------=
---</div><div><br>
...


And from David:

Subject: License permission for analyzeMFT
From: David Kovar <dkovar@gmail.com>
Date: Sun, 5 Feb 2012 12:53:52 -0600
To: Kristinn Gudjonsson <kristinn@log2timeline.net>

I, David Kovar own the copyright to the analyseMFT source code and I =
give Kristinn Gudjonsson permission to port the code to perl and publish =
it under the GPLv3 license with the requirement he include my copyright =
in the perl module.

-David Kovar

