On a Windows 7 PC, SS2008's performance would tend to be rather "jerky" (that was the way it was for me), but a "cure" was suggested somewhere on this Forum and it helped.
- First make a backup of the 'questviewer.exe' file in SS2008
- Copy the 'questviewer.exe' file from SSE
- Paste it into SS2008. (Say 'Yes' to any message that asks permission to overwrite the existing 'questviewer.exe'
file in SS2008.
Performance was pretty smooth after doing this.