What problem were you trying to fix with the load that came with 3.2.2? If there wasn't one then just go back to that.
You should just be able to put in the load 7960 command under telephony-service configuration to specify the original load - just make sure you have the tftp-server command in to serve the file.
If you've upgraded to a signed image you'll need to use the .sbn load file as opposed to the .bin.
Aaron
Please remember to rate helpful posts to identify useful responses, and mark 'Answered' if appropriate!