How can i Configure Apache as proxy, do i only have to comment the lines "ProxyRequests On" and add a "reverse Proxy" somewhere else ?

moreover, since i made my tests on my server putting the entire path in html files, somebody told me that with proxy architecture, that doesn't work since i have to put a relative path in the html files !!!!! what does it mean and how can i fix this if i have to change paths in my .html files ?

thanx so much

PS : the only protocol that i need to use are http !