Google Desktop

So I’ve indexed my laptop now and was worried to see files from as far back as 17 November 1996. On closer inspection most of the really old files seem to ship with MS Office.
Now I know having worked for a large company creating software previously that sometimes legacy code remains simply because no one knows what it does.
In this case however many of the files seem to be windows meta files. Now I know most of them are only 12 to 13k (like the lovely hearts C:\Program%20Files\Microsoft%20Office\MEDIA\CAGCAT10\J0230876.WMF) but that means that firstly Microsoft have not updated the clip art in Office since 1997 and secondly all of this dodgy stuff is cluttering up my hard drive. No wonder it takes so long to install and start etc etc.

So some other random thoughts here;
Can I remove all of these files safely?
Is Google indexing the dates correctly?
Why oh why did someone create this delight? C:\Program%20Files\Microsoft%20Office\OFFICE11\BITMAPS\STYLES\STONE.BMP