I don’t know how you would get the entire menu item with it’s contents back, short of going back to an earlier time before you deleted it, and that is a bit drastic. (what’s it called again?)
I am on Win 7, and mine are stored in C:\Program Files (x86)\Common Files\DAZ. In XP you wont have an x*^ folder unless you are running the 64 bit version. You could try looking in C:\Program Files\Common Files\DAZ.
One of the uninstallers you may have is called Victoria4Base_Uninstall.exe, you could try a search for that if they are not in Common Files.