Import a data project having transformations


I am trying to import a zip file it has manifest, header and an xml data file, this xml needs to be converted using xslt. The xslt is present under resources> data entity name> file. However I am not being able to import this package. Can anyone please help me here. Or could you suggest any other way by which I can store this xslt transform in the system and each time I do import it is invoked, instead of manually doing the mapping every time.