how to insert a layer to multiple mxds

I'd like to insert or add a single .lyr feature into the first data frame of each of two mxds, named "One" & "Two", both stored in the same folder. Each mxd has two data frames, "Layers1" & "Layers2". The layer feature I want to insert is called "new".lyr I've checked the arcpy site package for sample code and read a lot of the old python threads and can't find the code to set a variable "mxd" = multiple mxds
I also don't know the code to save the two mxds after the new layer has been added.
Ken