It’s not very much documented, but if you have a lot of WordPerfect files, try renaming their extensions to .DOC. Word will load them, unless they are very old files from WordPerfect for DOS.
If you have a huge tree of WPD files, use a batch file like this:
For /R "X:\TOP_OF_TREE" %%G in (.) Do ( Pushd %%G Echo now in %%G ren *.wpd *.doc Popd ) Echo "Done!"