[chiefweasel]

I think what you are looking to do is split your files up, Core files in the root dir and user created files someplace else. This has been brought up before as well, so that multiple machiine could access the same files and thus maintain 1 consistant image. Its a good idea but I dont think HL can do this on the fly.

You can use the secondary file system to get downloads from different sources, so if you would like to do installs each time you load HL you could do it that way.