NR2003's Aero88 mod is popular among sim racers for its realistic depiction of late 1980s NASCAR. Finding high-quality templates is essential for creating custom car liveries. Numerous websites and forums dedicated to NR2003 offer a wide array of Aero88 templates. Always ensure you're downloading from reputable sources to avoid malware and to get the best quality files. Once downloaded, use a paint program like Photoshop or GIMP to edit the template and apply your designs.