Velkommen til GTA5-Mods.com

Implementing something similar to this might solve it, but I wish this was open source so I could test it out:

public void LoadSettings()
{
// Load the settings from the XML file
XDocument xmlDoc = XDocument.Load("AutoEngineSoundSwap.xml");

// Create a list of SwapSets
List<SwapSet> swapSets = new List<SwapSet>();

// Loop through the SwapSet elements in the XML file
foreach (XElement swapSetElement in xmlDoc.Descendants("SwapSet"))
{
// Get the ModType attribute
int modType = int.Parse(swapSetElement.Attribute("ModType").Value);

// Create a new SwapSet object
SwapSet swapSet = new SwapSet();
swapSet.ModType = modType;
swapSet.Swaps = new List<Swap>();

// Loop through the SWAP elements in the SwapSet element
foreach (XElement swapElement in swapSetElement.Elements("SWAP"))
{
// Get the attributes of the SWAP element
int modID = int.Parse(swapElement.Attribute("ModID").Value);
string engineSound = swapElement.Attribute("EngineSound").Value;
int powerMult = 1;
if (swapElement.Attribute("PowerMult") != null)
{
powerMult = int.Parse(swapElement.Attribute("PowerMult").Value);
}

// Create a new Swap object
Swap swap = new Swap();
swap.ModID = modID;
swap.EngineSound = engineSound;
swap.PowerMult = powerMult;

// Add the Swap object to the SwapSet object
swapSet.Swaps.Add(swap);
}

// Add the SwapSet object to the list of SwapSets
swapSets.Add(swapSet);
}

// Store the SwapSets in the dictionary
foreach (SwapSet swapSet in swapSets)
{
if (!swapDictionary.ContainsKey(swapSet.ModType))
{
swapDictionary.Add(swapSet.ModType, swapSet.Swaps);
}
else
{
swapDictionary[swapSet.ModType].AddRange(swapSet.Swaps);
}
}
}