Cacheman is not for virtual memory; it's for physical memory. If youre running a windows 98 or ME computer the most you can utilize for one program is 128 Meg of your Ram. Casheman allows you to use all available physical memory (Ram) for whatever programs your running. Another words, you may have 256 Meg of ram but you wont be able on a win 98 or ME machine use more then 128 Meg for Poser. It's better to use physical ram then virtual memory. Physical ram is faster and not using virtual ram so much will save the life of your hard drive.