I suspect the best reason that Perfect Space doesn't come with presets is that one could easily create a preset that would crash any CPU on instantiation.
A convolution preset that works ok on one system might just yank another system to the ground.
If I was distributing presets for Perfect Space... I'd probably stick with some real lame ones with very short IR tails just so that the first impression wasn't a Blue Screen.
The best thing for a user to do is to dig into Perfect Space and make their own presets... presets that work on their system.
The next best thing to do is grow out of Perfect Space and buy it's big brother Pristine Space for $99.00 from Voxengo. I'd say it is the best value in the entire reverb business.
Once you get used to Pristine Space you'll realize Perfect Space is actually a cripple ware version of Pristine Space.
Perfect Space is an incredible opportunity to become familiar with convolution technology... you can use it for many things in addition to reverb effects.
Have Fun!!!
best regards,
mike