Is the project a screen saver project Is the program it creates a screen saver If not, then the scr file is probably not a screen saver file.
It might help to mention what the project is in sourceforge; what is the name we can use to look at the project. Perhaps none of us will look at it but if we know what it is then there is a chance that we might look at it and that might help.
Is there a dsp file That is probably a project file for older versions of VC and you probably can convert it to a project file for VC 2005. If there is not a project file then there is probably makefile and you can create a VC project that uses the makefile. If you don't see a file with the name "makefile" without an extension then look for a file with a "mak" extension.
If there is not a file eith a dsp or vcproj extension then it might help to look in the comments for the sourceforge project and/or create a comment.
Are you using visual studio If so, following information may helps:
Since I don't see any project file exist in your files(*.vcproj), so I suppose you only have the complete source code, in this case, you can make use of "project from existing code" functionality provided by visual studio, detailed steps can be found here: http://msdn2.microsoft.com/en-us/library/754c3hy7(VS.80).aspx
hope it helps