Welcome to my Team Ico channel ; )
I use the PCSX2 emulator on a PC to play the game (Shadow of the Colossus) and a memory editor (Tsearch & MHS) to mod or hack the game allowing me to go to places and do things that aren't possible normally. With time I've become more experienced so I can do things now that I never thought possible before (like exploring the cut scenes or controlling colossi etc). This is largely due to WWWArea's help and support along the way ; )
In Ico I use a Codemaster free camera control (credit to Fibre) and the debug menu (credit to Einstein99), allowing me to view inaccessible areas.
I was inspired to take this path due largely to hackers like Pikol, WWWArea, Dark0ssX and Radical Dreamer, the early pioneers who first found ways to explore beyond what was possible in the retail game. Both games are masterpieces in my opinion, hence my numerous uploads!