This is a great request. Since Need for Speed Underground 2 is an older game (2004), a "helpful feature" for the version usually means solving modern PC problems (widescreen, crashes, controller support) or adding convenience (saves, car unlocks).
echo [3/4] Installing controller wrapper... copy /Y tools\xinput1_3.dll ".." echo. Need for Speed Underground 2 - -DODI Repack-
echo [4/4] Unlocker save game (backup yours first)... mkdir "%USERPROFILE%\Documents\NFSU2" 2>nul copy /Y saves\unlocked_save.* "%USERPROFILE%\Documents\NFSU2" echo. This is a great request