Fallout shader patch to allow more than 3 lights

// C# code, shaderText should be a string of the disassembled shader contents (from "psa.exe shaderFile.pso /Fc")
// Ugly code but seems to work on every shader I tried with.
private string UpdateShader(string shaderText)
{
    var list = shaderText.Split(new[] { "\r\n" }, StringSplitOptions.None);
    var start = "";
    var perLight = "";
    var endLight = "";
    var end = "";
    bool inShaders = false;
    bool endL = false;
    foreach (var line in list)
    {
        if (!inShaders && !endL)
        {
            if (line.EndsWith(", c20"))
            {
                inShaders = true;
                start += "\r\n";
            }
        }

        if (inShaders)
        {
            if (!endL)
                if (line.EndsWith(", c21"))
                    endL = true;

            if (endL)
            {
                endLight += line + "\r\n";
                if (line.Contains(", c6,"))
                {
                    endLight += "\r\n";
                    inShaders = false;
                }
            }
            else
                perLight += line + "\r\n";
        }
        else
        {
            if (!endL)
                start += line + "\r\n";
            else
                end += line + "\r\n";
        }
    }

    endLight = endLight.Replace(", c21", ", c28").Replace(", c6,", ", c13,");

    var text = perLight;

    for (int i = 2; i < 9; i++)
    {
        var posRegI = 19 + i;
        var posReg = $", c{posRegI}";

        var colRegI = 4 + i;
        var colReg = $", c{colRegI}";

        var thisTxt = perLight.Replace(", c20", posReg);
        thisTxt = thisTxt.Replace(", c5", colReg);

        thisTxt = $"\r\n// Light {i}\r\n{thisTxt}";
        text = text + thisTxt;
    }

    return start + "// Light 1\r\n" + text + "\r\n// Light 9\r\n" + endLight + end;
}