yeah you can either make your own or just leave them alone until they're fully implimented.
personally i think CSG is just a waste of time really, and it isn't there for what you believe it is.
Constructive Solid Geometry is something used within BSPs (and no doubt you've got what you think it is from within something like Worldcraft or alike) ... it is effectively the method used to build Vis leafs within a world, at this point yes you can take and add geometry ALOT faster than standard Boolean Operations, but it was actually designed just to prime your levels before you convert them to BSP.
probably the major difference to be seen would be using a simple Box test... you CSG the world and the Leaf nodes are already setup so you can just subtract and your boolean operations will work alot better but more importantly you now vis this world or lightmap it and instantly they're more reliable in how they perform and more over when you compile the vis it goes from 1min on a p200 to 20seconds - this speed can help when you compile larger levels - worlds of 20,000 polys which did take a good 2hrs to compile now take a mear 1h5min ... oki so still a long time (for a p200) but you get the idea
Tsu'va Oni Ni Jyuuko Fiori Sei Tau!
One block follows the suit ... the whole suit of blocks is the path ... what have you found?