Instead of manually creating manifest.xml, solution.ddf and ultimately, the wsp file, why not install WspBuilder Extensions for Visual Studio 2008 (http://www.CodePlex.com/WspBuilder) and let it take care of all of this for you? What a pity that even with the delivery of VSeWSS 1.2 for VS 2008, Microsoft still doesn't provide a built-in way to automate the creation of manifest.xml, ddf and wsp files. Thank goodness for third party replacements that do the job that Microsoft overlooked.