PCI-E to PCI-X

I'm looking for a solution to use Protools HD core PCI-X on a new mac pro with PCI-E slots.i have seen expansion chassis that does it but are not qualified by digidesign! my question is will it work?
there the kind of product i'm talking about:HT-1010 PCI-Express Bus to 4 x PCI Expansion chassis

All I know is the voltage of PCI-E slots is lower than PCI-X. You can put a PCI card in a PCI-X slot...but nether in a PCI-E. Ive never seen an adapter to do this,although they may exist...be very careful not to damage your Mac.

And for damage read KILL!

DigiDesign Expansion Version 8.0 is the go for the Mac Pro.

http://www3.digidesign.com/index.cfm?langid=100&navid=54&itemid=23030

I'm also curious if the HT-1010 PCIe to PCI expansion works with Protools. OP, or anyone else, have you had any luck with this?