Despite the convenience, using unauthorized portable versions carries significant risks: Portable AutoCAD 2008 Installation Guide | PDF - Scribd
: It allows you to "check out" a license from one computer and transfer it to another (e.g., from an office desktop to a field laptop) without a permanent re-installation.
While "better" for portability and speed, AutoCAD 2008 PL Portable has distinct downsides:
: AutoCAD 2008 was designed for hardware with as little as 512 MB of RAM, making it attractive for low-end systems.