Thanx NightHawk and Ztruker for extensive info (which is hard to find even in professionals i know among my online mates) which shed a dazzling light on the subject which unfortunately shows a bottom line underlined in red-"No luck buddy." But, on the other hand i just found out a way around it. Actually there are some games which my 10 yr. old (especially GTA vice city and san andreas) likes very much, were not running on my lappy. So i thought installing xp might help.But after changing compatibility settings (which i tried after posting my problem yesterday) they are running smooth. So i think i'll wait some more for world to turn its attention to develope 64 bit softwares as I don't want to upgrade to pro or ultimate right now.
Again thanx a lot for your perfect response on the matter (i've been searching the net regarding this but nobody had the exact answer to my query ) ! So many questions are clarified at a time. I'll use your recommended apps if required.