How do I sync between VSS and SVN

To get rid of the manual merge step, I could use a separate svn branch (svn://branches/VSS) as follows:

1. Create a working copy of svn://branches/VSS
2. Do a VSS Get Latest on this working copy
3. svn commit
4. svn merge from svn://trunk
5. svn commit
6. Do a VSS diff and checkout all files (without overwriting) with differences
7. Check in those files
8. reintegrate svn://branches/VSS into svn://trunk

What I have done in the past is as follows:

1. Make sure all my changes are committed to svn://trunk
2. Do a get latest from VSS into my working copy.
3. Manually merge the changes in my working copy.
4. Commit the merged code into the svn://trunk
5. Do a VSS diff and checkout any files with differences (without overwriting files)
6. Check in those files.