I thought that CS4 had added Find in Project via a Rt-click on the Asset in the Project Panel, though I could be wrong, and do not have CS4 to check. Hope someone can tell me that I am correct, or am confusing another feature addition.
I found it! Thanks to your phrasing "Find in Project":
I'd been searching for "Reveal in Project"
That's brilliant, thank you.
Great news! I thought that it had been added. I too inherited a major Project and could have used that 1000 times. Unfortunately, I am still on PrPro 2.0 (CS4 was not out then), so I had to do it pretty much manually. Fortunately, many of the Assets were in a semi-logical order, so it was not as tough as your case. Also, I was able to place the old edit into logical Sequences, so I was only working with 1 Timeline at a time, and not the original 8+ hour behemoth, that had been started. This limited my searches to maybe 100 Assets at a time.
Glad that you found it, and now I can look forward to using it, when I upgrade.