The *.vm files are in our plugin but you can download this bundle, unzip it in your own directory somewhere, make their modifications and then point the reverse engineering wizards to this directory with their modified version.
You can go to Help > Help Contents > MyEclipse Learning Center > Spring/Hibernate Development > Getting Started > Hibernate Development, go to the end of that tutorial document and at the bottom in the resources section there is a link to the MyEclipse Reverse-Engineering templates. That is the zip file that contains all of the *.vm files. You can unzip that in c:\temp or whatever and in the reverse engineering wizard there is a location at the top of the wizard where you can specify alternate location for the template files. Point it to this directory.