First: Make a backup copy of the Registry: Choose Start > Run. Type "regedit" in the Open text box and then click OK. Choose Registry > Export Registry File. In the Export Registry File dialog box, choose a location and type a name for the backup file, then click Save.
Second: Remove Pagemaker Choose Start > Run again. Type "regedit" in the Open text box and then click OK. Choose Edit > Find and search the registry for "PageMaker."
Removing these entries will remove all versions of PM. Caveat - playing with the registry can nix your system for good if you are not careful.