I don't know if your assumption is correct. I said "if ever...". Truly, for me I cannot see any problem. I'm also doing professional work with Vue. If I need Vue to work with Poser 4, I will keep Vue especially for it on my HD. And if needed, I will copy /Past the entire Vue to another place on my HD, upgrade this copy to Vue 4.2 and use it with Poser 5. So I can do both. Again: where is the problem?? :-)Guitta