Maybe I can offer some help here. Having used a lot of different open source packages and then had to update sites later, I know it's not the first thing a team thinks about. But often it is the difference between happy web admins following your package
for a long time, or letting it drop after working with one version of it.
The Mojoportal team had this same problem with deploying via the "Import Application" option on IIS. see this support forum thread http://goo.gl/tFcG7
BTW, it was not that I wanted to update using the package. I was trying to use it to install a new version of NearForums. As I said, I used the appropriate version of IIS on two platforms and the "Import Application" method failed. It did seem to register
the manifest okay, but it could not run to completion, throwing the error above.
I conclude that the team put two zip files on the Codeplex download page for a reason. I see that in the "Web and DB scripts" option there are separate scripts included for using MySql. But the "Webdeploy Package" is clearly meant to be an IIS compatible
installation option. It has no extra MySql scripts. (see this picture illustrating how the IIS "Import Application" reads the Webdeploy package when it is opened. http://imgur.com/EEHfY
In summary, I don't mean to 'beat a dead horse' here, I'm just trying to understand what the team is giving us to deploy from the Codeplex downloads page. I am certainly able to unzip and install to IIS, but I'm also clear that if I am looking for more comprehensive
instructions (especially when things do not work as expected), that others will be looking too.
Meantime, there is always good old Web Platform installer. Heck, even that can fail to deliver a good install experience. On my developer machine I have latest components of VS installed, including LocalDB. The second instance of SQL server can throw the
Web Platform Installer for a loop. Mojoportal thinks that even Web Platform installer deserves documentation: http://goo.gl/MafE9
Oh, I just found the installation documentation. An option for Web Platform installer and then this second page which details how to install from the Zip files. http://nearforums.codeplex.com/wikipage?title=Manual%20Install&referringTitle=Installation%20guide
But notice that even on that page you have two separate comments from people who had trouble with the install.