Thanks for your help, what i wanted to ask, may be i wasn't able to make my self clear to you. Any way i have upgraded to 24.1v successfully. I was wondering if you can make this guide a bit more comprehensive as there are not so many people around who are familiar with this procedure and they might find it confusing, if they are using it for the first time, like me.
The information which was bothering me and wasn't available in this guide was that:
1. connect your phone in "on" condition to the pc
2. then select usb-rm(xxx) for your mobile phone as the connection type
3. and then scan your product and go on with the rest of the procedure mentioned as it is in the guide
that implies for upgrading i guess and for downgrading one has to set "No Connection" type and then chose "dead usb flashing" option, that's so far i have understood from this site. Pardon me if i am wrong, thanx any way and keep up the good work.