Are you looking for a excel file where you can bulk upload data to PI using a simple macro? [PiPutValx function?]
Try downloading this file: http://dl.dropbox.com/u/2885309/SendToPI.xls
Remember to enable macro under security settings in Excel. As is, it will write to default PI server. [SDK]
[Requires DataLink to be installed, off-course]
@Roger: This PI-DES tool that you mention is an internal OSIsoft tool used by the technical support group. It is not intended to be distributed nor supported.
To give you some hints about how it is done, the PI-DES uses a series of PI SDK calls to push and/or events for one or multiple tags. Depending of your needs, Robert suggestion should work well either.