For those revisiting Uncharted 2 on a PlayStation 3 in the modern era, downloading update 1.09 is automatic, though with caveats:
General modifications to character game mechanics were implemented to prevent players from utilizing various environmental and movement exploits. uncharted 2 update 1.09 download
If you are playing on a physical PS3, the update is usually handled automatically. Automatic Prompt : Simply launch Uncharted 2 For those revisiting Uncharted 2 on a PlayStation
From what I recall:
(Note: Exact changelist text varied across community summaries because official patch notes for some minor updates were brief.) downloading update 1.09 is automatic
Simply launch the game while signed into the PlayStation Network. The console will automatically detect the 1.09 patch and prompt you to download it.