Since multiple orbiter installations seem to be quite popular, and can take a significant amount of disk space, it occurred to me that many people may not be aware of a fairly easy way to save space:
Most of the disk space of an orbiter installation is taken up by the Textures and Textures2 folders, which quite often are identical in the different Orbiter installations. If that is the case, you can move the Textures and Textures2 directories from one of your installations to some common repository location, delete the Textures and Textures2 directories from your individual orbiter installations, and modify the TextureDir and HightexDir entries in your Orbiter.cfg files to point to the directories in the repository.
Alternatively to editing the Orbiter.cfg files, you can place symbolic links to the repository directories in your individual orbiter folders. I only just noticed that Windows does support proper symbolic links:
http://msdn.microsoft.com/en-us/library/aa365006%28v=vs.85%29.aspx
http://technet.microsoft.com/en-us/sysinternals/bb896768
The symbolic link method is also less likely to break addon installations which don't take into account that the Textures and Textures2 folders may be in a different place.
Note that you shouldn't share Textures directories between different orbiter versions (e.g. 2006 and 2010) since the texture format has changed.
Most of the disk space of an orbiter installation is taken up by the Textures and Textures2 folders, which quite often are identical in the different Orbiter installations. If that is the case, you can move the Textures and Textures2 directories from one of your installations to some common repository location, delete the Textures and Textures2 directories from your individual orbiter installations, and modify the TextureDir and HightexDir entries in your Orbiter.cfg files to point to the directories in the repository.
Alternatively to editing the Orbiter.cfg files, you can place symbolic links to the repository directories in your individual orbiter folders. I only just noticed that Windows does support proper symbolic links:
http://msdn.microsoft.com/en-us/library/aa365006%28v=vs.85%29.aspx
http://technet.microsoft.com/en-us/sysinternals/bb896768
The symbolic link method is also less likely to break addon installations which don't take into account that the Textures and Textures2 folders may be in a different place.
Note that you shouldn't share Textures directories between different orbiter versions (e.g. 2006 and 2010) since the texture format has changed.