Personally, I like them in directories too, even though I drag them individually like Chailynne. Having a directory structure in the Zip file shows me where thigns are supposed to go. I use a Macintosh. As far as cross platform issues go, please package the files in some sort of standard format (Zip is best as it is widely supported). A few of the FreeStuff submissions I've downloaded have been self-extracting .exe files, which not only pose a problem for Macs they force everyone else to hope that they're not about to infect their PC with a virus by running it. MartinC's MacConverter is so incredibly fantastic that I never worry about getting items converted over from the PC Poser formats now. For image formats, I think jpg on a high quality setting is best. TIFF files tend to be larger (albeit without any compression loss), and bmp is aweful.