One cannot think of performing this kind of a function in the system without adequate RAM in PC. However the main question is as to how much RAM is pertinent? In terms of RAM the more you have in your system the better it is for its performance, however it so highly recommended that you should at least have 2GB RAM in your system. Though there are people who even work on 256MB RAM but probably their functionalities are simply limited to using the Microsoft Word applications or may be just to browse the internet a few times.
In that case it is not very essential to go in for extensive amount of RAM. However, in case you want to use your system for other things then it would be mandatory to upgrade your system with RAM so that there is adequate amount of RAM. However while doing so; it has to be ensured that the RAM used is of a good quality and from reliable sources only. One should be watchful about the companies that you buy RAM from as there are many spurious and counterfeit companies that are out to make good profits on each transactions that they do.