Why not to change another CAD software -- AXCAD. The AXCAD just require approx. 20MB of hard drive space. And it doesn't require the space of EMS memory. AXCAD is a 100% DWG compatible and AutoCAD command compatible, is another affordable choice for CAD users. 100% DWG compatible, using DWG as native file format. You won't lose any dwg files to use this affordable CAD. Supports AutoCAD 2007 dwg format (from r2.6~2007) High degree of AutoCAD command set compatible. You won't spend much time on learning AXCAD. Supports LISP and ADS development. Functionally with EXPORT DWG to PDF. AXCAD can speed up and save your drafting time. Launch AXCAD with 5 secondes, when launcing AutoCAD with 45 seconds. Please go to http://www.axcad.com to get more details about this software. Also, I'm the reseller of this software, and i can offer you some discount for this software if you want to purchase it. My mail address is sivi.fang@gmail.com