Batch Object Name Editor
The Object Name Editor tool offers the ability to batch rename objects. The tool allows case sensitive search and replace, appending text, trimming characters and numerical incrementing.
Installation: Download the script. Drag the downloaded file from where you saved it into the 3ds Max viewport. Go to Customize / Customize UI and select the toolbars tab. Change the category to NameEditor. Drag and drop the NameEditor tool to somewhere on your UI and a new button should appear.