This took me a couple of hours to figure out so i write it up if anyone else want to keep their running enviroment while playing around a while on 1.0.1 before taking the plunge.
On the fog 0.32 server
Copy the file pxechain.com from that archive to /tftpboot/
Append these lines to /tftpboot/pxelinux.cfg/default :
MENU LABEL FOG 1.0.1
(replace “NEWFOGIPADDRESS” with the ip of the new fog server)
copy the file /tftpboot/default.ipxe from the 1.0.1 server to /tftpboot/default.ipxe on the 0.32 fog server
PS. Thanks Tom and the rest, you are all awesome! DS.