No, Win98 runs up to (I think) 1.5GB, and there may be a fix beyond that. However if you go over the .5GB you do need to add VCache settings to your startup file so that Windows doesn't end up using the whole of your RAM for caching directories (which is likely to happen if Poser goes looking for textures). This is discussed in a technote on the MS site. What you won't see, by my understanding, is significant improvement in the performance of a single application, though multi-tasking may improve. I certainly ran 98SE with 768MB RAM for several months.