I have added the acpi=off command in the settings.txt file (per tid 3004541) but it is not "taking". I have made sure that the file has no extra cr/lf etc. I added it to the end of the file (followed by the 2 modprobe commands, same tid reference). The new hf2a has fixed the one problem I have been having with the CF52s but I am still having the acpi problem.
Thanks for any help.