SubdivisionControl
Will change various meshsmooth values globally for all selected objects. You can also copy the display settings to render settings - and vice versa. Can work on meshsmooth modifiers or polyobjects - or both.
For a max 5 - 4.2 version of this script - please download bspack_r4_r5_v031.zip. Use the original bspack_r42.zip if you want only max 4.2 compatibility.
The only major differences between script packages are slight version compatibility issues - there are no new scripts added between the 3 packages.