One the the errors I encountered was "Could Not Find Feature TransMgmtLib" when importing a site. This error occurs when the MOSS site you are moving had features installed that the SharePoint Foundation installtion does not.
I resolved this issue by the following process:
You will need to install the following features in your SharePoint Foundation farm:
1.SlideLib
2.TransMgmtLib
3.RelatedLinksScopeSettingsLink.
4.BaseWeb
5.ReportListTemplate
6.Dataconnectionlibrary
7.BizAppsListTemplates
8.PremiumWeb
By default, SharePoint Foundation does not have the above listed features. You will need to copy them from MOSS to SharePoint Foundation. You will find the above mentioned feature on MOSS server in the C:\Program Files\Common Files\Microsoft Shared\Web Server Extensions\12\TEMPLATE\FEATURES folder.
Copy the feature to the following folder on SharePoint Foundation Server:
C:\Program Files\Common Files\Microsoft Shared\Web Server Extensions\14\TEMPLATE\FEATURES
Once copied, you can install all these feature using the following command.
Stsadm -o installfeature -name
Example: stsadm -o installfeature -name slidelibrary -force