The highly compressed version of Test Drive Unlimited 1 is approximately 1.4 GB in size, making it easy to download and install on your PC. Here's the download link:
Repackers (like FitGirl, Dodi, or Razor1911) use advanced algorithms such as FreeArc, LZMA, or BCJP to reduce sound quality slightly (keeping dialogues clear) and pack textures into dense archives. You download a small .exe or .zip file, and upon running the installer, your CPU decompresses the data back to the full 7-8 GB.
Most highly compressed versions come with the necessary "crack" files pre-included or applied.