Out of experience, i'd rather not. During the beginning of SATA, i used SATA <-> IDE adapters, and i have some laying around here. I used these, to get rid of one or another controller, to improve boot times. Unfortunately, even with simple devices as (empty!) DVD-Roms, i had lockups, which only disappeared, when i reconnected the devices to their original controller. I can't put my finger on reasons, though, it may just be bad luck.
Because there are many different adapters and the most popular (=cheap) ones are usually a piece of junk.
Check this topic: http://www.msfn.org/...s-whichwhatwhy/