Installing this requires changing content in registry of your computer and can harm your computer to the state of usability (Which has been experienced by at least one ). I suggest if you do not feel comfortably with this then do not attempt to install this or try to modify your computer in any way in the future.
The creators of the program used to make this modification as stated on their site as well as myself take no responsibility for what harm this procedure may cause to your computer.
Remember, modifying one's computer is your own risk.
Heres my last bit of Homestuck fandom for a while.
To install the files you are soon to download, use Windows 7 Boot Updater [link]
Once you grab the Boot Updater and have unzipped the file you get from that download file button over there (not that gif up there), you just need to open the boot updater and go file> load boot skin and then select that random .bs7 file in either the 4:3 or 16:9 folder. That will get rid of the hassle of loading the bmp yourself. The file is set up with a black background and also the blue text BOOTING SGRUB with ©Sollux Captor at the bottom, which you can easily change with the text box thing on the bottom left of the program.
Also my other two Homestuck related Boot Screens:
Sburb Alpha Boot Screen[link]
Sburb Beta Boot Screen[link]