Acrobat Reader Update 7.0.x

First, install Acrobat Reader 7 normally (download the installer from adobe.com, double click on it, and install it). Then start it and check for online updates. Two files will be downloaded (7.0.1 update and 7.0.2 update). After installing them, look at C:\Programme\Adobe (for german Windows version) and catch the msi-files in the folders: {0C55731F-7B21-4936-839A-BA09B2EAED59} and {AC703000-70F3-4E65-BC6A-CF781045277C}. Just copy them to your server.

excerpt from package.xml:

<package
 id="acrobat701"
 name="Acrobat Reader Update 7.0.1"
 revision="1"
 reboot="false"
 priority="9">
 <check type="uninstall" condition="exists" path="Adobe Acrobat 7.0.1 and Reader 7.0.1 Update" />
 <install cmd='msiexec /q /i "\\server\wpkg\MSI\Acrobat\Adobe Acrobat 7.0.1 and Reader 7.0.1 Update.msi" allusers=1'>
  <exit code="0" />
 </install>

 <remove cmd="" />

 <upgrade cmd="" />
</package>

<package
 id="acrobat702"
 name="Acrobat Reader Update 7.0.2"
 revision="1"
 reboot="false"
 priority="8">
 <check type="uninstall" condition="exists" path="Adobe Acrobat 7.0.2 and Reader 7.0.2 Update" />
 <install cmd='msiexec /q /i "\\server\wpkg\MSI\Acrobat\Adobe Acrobat 7.0.2 and Reader 7.0.2 Update.msi" allusers=1'>
  <exit code="0" />
 </install>

 <remove cmd="" />

 <upgrade cmd="" />
</package>

Your Acrobat Reader 7 package description should have a priority of 10 or higher!
The shown package.xml is valid only for the german Windows version!