Using DateTimeStamper with FeatureWriter

Is there any easy way to add a date stamp to output file names when using the FeatureWriter? I am outputting Excel files that have multiple tabs with multiple separate inputs, from multiple data sources. The only way I could figure out how to do this without the FeatureWriter splitting up the different feature types into separate files is to add the DateTimeStamper to each data source, make sure it is kept all through the Workspace, and then take off the _timestamp attribute from each Feature Type in the Attribute list on the FeatureWriter. What a pain! Surely there is a better way? I tried to create a User Parameter, but it did not work. Any hints on this?

Thanks,

-L