using scala in an existing java project with eclipse 3.5

Hello,

I would like to 'convert' an existing java project to a scala project with eclipse 3.5. After playing around a while it seems to be not possible, right ? I have to create a new scala project with the wizard and could than mix java and scala classes together in that project. So what I would like to know is - is it possible to create scala classes in an exisiting java project ? Even if I 'patch' the eclipse .classpath and .project files manually I always get the same error as described here :

http://www.nabble.com/-scala-tools--Scala-IDE-errors-to25762989.html.

And JDT weaving is eanbled, my eclipse installation isn't read-only and I've used a clean installation with no other plugins.

Lothar
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