1. Download
Easy Tutu if you haven't already. It's the latest version of the 'tutu' mod and is quite easily installed, thus the 'easy tutu' bit. Exact same as the other versions, don't worry!
2. Install Baldur's Gate. While installing, be sure to select custom installation, and then when the option comes up for what components to install, check all the boxes. All of them, this is important!
2. Install the expansion as well, be sure to again do like above, and choose a custom installation where you install every possible component.
3. Guess what? Install Baldur's Gate 2. This time though there's a hand 'full' installation option so you can just go ahead and choose that rather than having to manually select everything.
4. Yet more installing, this time Throne of Bhall. And again, you guessed it, it's gotta be a full installation.
It's
EXTREMELY important that you have everything 'fully' installed. If components are missing, this mod and many others simply wont work.
5. You'll want to make sure both the first and second games are patched up to date as well. You can download the patches for Tales of the Sword Coast
HERE and for Throne of Bhall
HERE
6. Now, and only now, once you're certain you've got both the first and second Baldur's Gate games fully installed and up to date, do you run Easy Tutu. Be sure to download the ToB version of Easy Tutu, as trying to install the wrong version will cause problems. To install the mod, simply run the .exe file and follow the instructions given. It's like any other installation, just keep in mind it will take some time before its done.
What this mod does is it ports all the content from the first BG game into the much improved second games engine. That's the reason the installations must be 100%, or there will be content missing. Rather than simply copy and pasting files though, this mod creates a completely independent version of Baldur's Gate 2 which runs the BG1 content, what this means is that it will have its own directory and start up Icon. At this point you can even uninstall the first game if you like, although I would suggest waiting until you've finished all the other steps and run the game first.
7. Download and install the 'De-Greenifier',
Link. You'll need to cut and paste this into the BG1 Tutu directory, which will be independent of the others. This is how I have it set up on my computer:
Copy and pase the 'EasyTutuDegreenifier' into the Tutu directory, and then run it. It'll ask if you want to install, the answer is yes, wait a few minutes, done!
Congrats. The game is now fully installed and ready to be played.
Look in your start menu, you should have something like this:
Select the config, turn all the hardware options to the maximum, then crank up the resolution as well.
Now pop the Throne of Bhall disk in, click Baldur's Gate Tutu, and enjoy!
If it works, yay, you can now uninstall the original Baldur's Gate installation if you want. Don't need it any more.