VMware question

I am still in the transition from XP to Linux and have some more questions: I have now an image of XP on XP created. I have also created other images from other Linux versions created. Unfortunately the space on my hard disk became to small and I moved the directories of the virtual machines to another drive. The image did not work anymore. I moved it back, it did not work anymore either. I had to re-install the image. Not a big deal for this test, but for the real transition, I would like to move the image over to the next hard disk. How can I do that? (on XP and on Linux and from XP to Linux) bye Ronald Wiplinger