To understand the search term "download nfs underground 2 profile creator upd," you must distinguish between the original tools and the version.

The "upd" (updated) version probably means a fan-made update to make the tool compatible with:

If you cannot get the UPD version to work, there are two alternatives, though they are inferior:

Choose any vehicle from the game’s roster, including late-game favorites like the Toyota Supra or Mazda RX-7, right from the start.