If you are stubbornly (or wisely) sticking with Photoshop CS3 because you own a perpetual license and hate the Creative Cloud tax,
The "DetailGuard" feature protects image textures and colors while filtering, ensuring the final result isn't overly blurred or "plastic-looking". Selective Control: noiseware photoshop cs3
You can’t buy NoiseWare for CS3 anymore—Imagenomic moved on to newer versions like Noiseware 5 for Creative Cloud. But if you find an old installer CD in a shoebox, remember: this little plug-in let the CS3 generation shoot with confidence in the dark. It didn't just reduce noise. It made noise bearable. If you are stubbornly (or wisely) sticking with
For CS3 users, Noiseware typically comes as an (Photoshop plugin format), compatible with both 32-bit and (limited) 64-bit versions of CS3. noiseware photoshop cs3