First off, this is amazing work. I've been cutting my teeth on a very stock KSP for the past couple of months, just using Kerbal Engineer for more info, getting familiar with the basics before going all mod-crazy. Now that I've gotten a few solid inter-planetary transfers and landings, I'm starting down the mod path. This pack is legendary, and I'm psyched to get started with it. I know it's probably frustrating to field yet another comment about the installation instructions, but I have a concern with the way you phrase it. (I didn't actually have a problem installing the pack.) It's not, btw, that you are unclear, and I did install the pack without a problem. This is more about semantics. As a developer, you don't need me to explain how the term "overwrite" implies a destructive replacement. If I already have other mods installed in Game Data, truly "overwriting" that folder will destroy them, right? Windows has this extra convenience where the action of replacing a folder gives you the option of merging them... so your instructions make good sense in that context. On a Mac, unless a user specifically tries to copy the folder (a drag-and-drop operation is a move), it does not even attempt a merge, it only asks you if you want to replace the folder that already exists with the one you are moving. This would result in the deletion of already installed mods. I haven't tried under linux. I realize it's not at simple as what you use right now, but in the interest of I'm offering the following wording: "Place the contents of the B9-Aerospace-Pack 'GameData' folder into the 'GameData' folder in your KSP directory. Place the contents of the B9-Aerospace-Pack 'ships/SPH' folder into the 'ships/SPH' folder in your KSP directory. If you have previously installed the B9 Aerospace Pack, you will need to overwrite the existing files in those folders." I don't want to be a pain in your ass or spark a windows/mac thing (well there's a 70% chance of that happening, but I just ignore replies that focus on platform wars instead of the substance of my comment), so by all means ignore this comment entirely this if you don't like the suggestion, do not feel the need to explain your reasons. Anyhow, thanks again for the incredible parts, they are absolutely amazing. And I'm completely psyched to see the new SPH you're working on!