
1) I use GPRS for internet but data tranfer cost me more. i have used adblock plus to block adds. but i want to know that is it really reduce the data transfer? i have heard that it only prevent the images and flash from showing in browser but those actually get loaded in temp folder. pls give some info.

2) is it possible to use USB net connector of one GSM/CDMA operator for other operators sim card.

3) i use firefox and have installed some extensions. i format my hard disk many times and installing those extensions and some costomisation is long task, so is it possible to save those extensions in other folders/ where actually downloaded exetion files go.

4)some help needed though its not related to Technology.
I want some statistical data. the details are like this. Prices of Onion, Bitter Gourd, Red Chilli, Tur, and Gram for last five years, in Pune, Hydrabad, Solapur and Vashi market may be monthly average or daily. i searched many websites bun yet not got anything. could u suggest me a good and free source on net or any book. Thanks a lot.