Hi Jim,
You can use the project bdoing the following.
Createa new project in VS2008 and add the *.cs files to you project.
This would work for you since the VS project version is not important in our case but the content of those cs files.
If you wnat ot see what has been fixed and what are the known issues in 5.5.1 (or any other later version) please read the release notes of the particular release you're interested in.
Please let me know if you still have question/concerns.
Thanks,