If you can't remove Smartdraw 2007 via the control panel do this:
Click on Start->Run and type cmd (a command prompt will open). At the cmd promt type (you can cut and paste): "Program FilesSmartDraw 2007Unwise.exe" /Z
A promt looking for INSTALL.log will open. Go to C:Program FilesSmartDraw 2007 and select INSTALL.log and click OK.

This should remove it from your PC