Leroux: I wonder, will we be able to do both at the same time? Install the game via Galaxy and backup the installer, without having to download the game twice? I mean if Galaxy automatically installs a game, does it download the DRM-free installer for that purpose and keeps it on the harddisk if desired, or does it directly install the game on the harddisk from server files and if I want the backup installer, I'd have to download it another time?
Nope, it downloads two separate files, though it appears that the files are identical in pretty much every way except the file name (the Galaxy installer has "galaxy_" prepended to the name). The Galaxy installer file gets downloaded to a temporary directory in the Galaxy directory while the backup installer will be downloaded to the directory you specify in Galaxy's options. At least this is the way the alpha currently works, not sure if the beta or any future releases might change that.