No, it seem the prl modules do not support kernel 2.6.38 yet. I tried with some modifications found in the ArchLinux forum (for 2.6.37 though) but could not compile the modules either. I already opened a support case for this (as 2.6.38 is now officially released), but I won't hold my breath...
I see this on every build and it dumbfounds me, why they make this Tool install so ridiculously complex. If Linux ever wants to go mainstream and get consumer support, they need to think more like consumers and less like engineers. Parallels too, should work on a circumvent here so the average New person Linux can get going quickly instead of having to figure out how to be a programmer. Ridiculous!!