Keep it on a USB stick. Keep it next to your keys. Because you never know when you need to join the Blacklist.
The is currently not available for purchase on GOG or any other official digital storefront. Any "GOG Portable" versions found online are unofficial fan-made repacks, as the game has been delisted by Electronic Arts due to expired car and music licenses. Availability Status need for speed most wanted 2005 gog portable
Ensure the widescreen fix or community executable allows the game to launch without checking the disc drive. Keep it on a USB stick