333151 modify index.php oscommerce

I have oscommerce shop which needs to be modified to this: mainpage is [login to view URL], is just hardcoded stuff in, so can be used seperate from the original [login to view URL] where all ocommerce stuff is in. so the main page would load faster because of this (is no rubbish in) the separate page can be remamed to lets say [login to view URL], and all [login to view URL] and [login to view URL] is directed to [login to view URL] for example. i have already a function like this in other sections of the shop Its not comlicated to do i guess, its just separating the diiferent php sections out.