If Adobe Photoshop does not support that file format you would need to install a Photoshop Plug-in that does support that file format. To use those files in Photoshop.Or find some conversion program to convert the epr file into a file format that Adobe Photoshop supports.
An epr Adobe file extension is an Adobe Media Encoder Preset not so much a template..
By the way how does one get a template epr file from a lighting fixture?
JJMack