Ok I have a question about that. I downloaded the SBW mod using nexus mod manager... So idk where to find the SBW.exe anywhere? I also dont get the autohotkey part too well...
1: Download the Simple Borderless Window mod manually, not through nexus mod manager.
2: Extract the downloaded file and you should now have a file named SBW.exe, right click that file and select copy.
3: Now navigate to where skyrim is installed on your pc, it will be something like c: / program files / steam / steamapps / common / skyrim
4: Right click on that skyrim folder and select paste to place a copy of SBW.exe into your skyrim folder.
5: Now open your skyrim folder and find the SBW.exe file you just pasted there and right click it and select SEND TO >>>>> DESKTOP (create shortcut)
6: Now you should have a working SBW.exe shortcut on your desktop.
Ok, now open the skyrim launcher as you normally do and change your settings to WINDOWED and your desktop resolution., then CLOSE IT, you will now be launching the game with the SBW.exe shortcut you made above instead.
With steam already running, just start the game by double clicking the SBW.exe shortcut you made on your desktop above.
Once the game has started , it will be in a window , just let it sit at the main screen for a few seconds until it finally re-sizes itself to fullscreen, then play the game.