Hey Vikas, I too have SA2003 (Delorme) and find it worse then SA7 which I also still use. At least with Street Atlas 7, you could enable the back-on-track feature while using the speech engine to speak the directions without ever touching a key. Soon as you reach the off course threshold, which is user settable, it recalculates new directions on the fly. In the 2003 mode, I had my wife do the driving so I could see all of its touted features, and to be honest, it has LESS than it SA7 has. You have to manually click back on track to force a recalc, even in "talking mode" and I find this to be very distracting.
What I wound up doing is ditching the laptop altogether in favor of the Garmin GPS-V which, as previously mentioned, is far better than anything I've used in an all-in-one unit. No cables, no PC to futz with. All of the routing including automatic recals, are all present. Just too many features to mention....
Ed