The latest version of Form Wizard Pro is not going to work with the latest source code. The reason is because the latest source code has been updated to use a newer version of Ajaxcontroltoolkit, since Form Wizard also uses this it must use the same version or it will cause errors. When I make the next release of mojoPortal I will make a new release of Form Wizard Pro at the same time to keep them in sync. I have already updated my local copy of Form Wizard but I cannot release it until the next release of mojoPortal.
These are the installation instructions for future reference, but you will need to use it with the current released version of mojoPortal not the current source code of mojoPortal.
Determine your .NET framework version (hopefully 4.0) look under Administration > System Information.
The Form Wizard Pro package has versions for both .NET 4 and .NET 3.5(aka 2.0).
So if you have .NET 4 then you use the contents of the folder in the package at
/dotnet40/wwwroot
else you use the contents of the folder at
/dotnet35/wwwroot
Note that I mean the "contents" of the folder do not copy the wwwroot
folder, copy everything inside it and paste it into the root folder of
your mojoportal installation.
The root folder is the one with the Web.config file in it.
If you do that everything will land in the right place, then all you have to do is visit yorsiteroot/Setup/Default.aspx page and it will run the database scripts and after that the feature will show up in the dropdown list with other features.