1) We hypothesize that drivers are the likely culprit, so make a copy of your preset then right-click the file and edit it. Find the component removal section, indentified by the <c></c> lines. Every item between those pieces of XML code are all items that NTLite will display in the "Components" section and will uninstall them from an image when the user processes it in NTLite. Select all components inside the preset file and delete those lines, except for all the drivers. Save and exit, then load this preset in NTLite and make a new image with it. We now have a new image with only drivers being uninstalled. Go install this new image and see if Windows still fails, and if it does then we confirmed our problem is a driver removal. If the problem doesn't appear, then our hypothesis needs to be reassessed.
2) After identifying drivers as the issue, we now have a "layer" to focus on. From here we can use our tweaking knowledge to try to make educated guesses and delete a few suspect drivers at a time, making a new image and installing it to test afterwards, until we find the culprit. Alternatively, if there's too many drivers or we don't know enough about them, then delete batches of them at a time, such as 10 or 20 drivers each, making a new image to test afterwards, until one of the images is successful. Once you've found a working image, backtrack slightly and start narrowing in on the last 10 or 20 culprits until you find the 1 or 2 actually causing the problem.