Matching vray p.cam angle to an existing photo

Good day po mga Sirs and madame,.. ask ko lang po kung pano mag match ng angle ng physical camera sa existing photo to be used as actual site background.. meron na po bang turorial nito? try ko lang po mag "photo montage" kung tama yung term ko... ko... Maraming salamt po mga masters.. Tid bits of knowledge would be a huge help for me.. Thanks and more power CGP! God bless!

baka may maitulong kahit kaunti bossing..
http://www.cgpinoy.org/architectural-f3/simple-office-bldg_photomatch_w-konting-tutorial-t7880-15.htm?highlight=office+building

thank you sir! siguradong malaking tulong to sir! God bless and more power sir!