what is rar. file n how can we install it on 6600?

you can't. a rar is a zip file. you need to download winrar or other such software that will unzip it. then you will see the installable product inside

u can download winrar at

www.rarsoft.com (http://www.rarsoft.com)

its kinda such a zip file.... it works for zip too... i just use winrar i think is better than winzip

thankx :)