Be sure you're putting them in the THUG2 directory, not the THUGPRO folder
try making 3 new blank individual text files being named the following:"skaterparts.txt""skaterparts_secret.txt""skaterparts_temp.txt"Then in your THUG2 directory navigate to Game\Data\pre, within there you should find 3 .prx files of the same name as the ones listed above. Backup these files someplace safe. Change the extention of your newly made text files from .txt to .prx and replace them with the files found in your "pre" folder. That SHOULD fix it but if it doesn't let me know.