I bought the PC version of Poser Propack for one reason, its ability to use JPEGs instead of BUM files. It has a couple of other advantages to it, the multiple camera window, PNGs instead of RSR thumbnails, and it can save compressed files, about 5 times smaller. At 128 meg of memory it runs well enough for my needs (1 or 2 figures and some clothes and a few props). It can be slow to update when you access a directory with a lot of files in it. Youre luckier in the U.S. as it costs $230 in the U.K. Overall the benefits dont equate to the cost for general Poser work, unless of course you are rich B)