This plug-in, specifically written for Maya PLE, exports Maya scene objects directly to UnrealEd 3. Static meshes are exported into the Static Mesh browser as components of .usx packages, and skeletal meshes export to the Animations browser as components of .ukx packages. Documentation for the plug-in's use is available when launching the version of Maya PLE 4.0.1 that shipped with the original UT2003 release (CD#3).
Maya 4 and 4.5 PLE users who have had problems getting the added Scale attribute of their model's export set to work properly can download the unEditor.mll version at the link below. This is a copy of the original plug-in version, dated 9/18/02.
Tests indicate that a later version dated 10/28/02 (offered as a downloadable replacement, and which may have been on some CD pressings of UT2003) ignores the Scale attribute when exporting models from Maya 4 and 4.5 PLE. If you've had this problem, the earlier version may help.