The Dink Network

Ok, so, my primary computer went haywire today. I dunno who screwed with it or how, but the system was unable to boot WinXP today, not even in safe mode. So I tried HP's system recovery tools, which basically reinstalled WinXP and all the old drivers. Joy of joys. Now, getting to my main problem for the moment.. each user account was archived, and I am able to access the documents from the now-extinct Tal side through Owner; however, I cannot access my oldest sister's documents, nor my mother's. They had protected them from outside use before, and now that the accounts are dead, "Access is denied." Can't be reached at all.

Any practical suggestions?