Yes,
You really need to look in the sipura provisioning guide. I'm pretty sure you can find it on-line these days. There are quite a few different ways you can set up spa-941.cfg to direct the phone to look for different filename formats in the tftpserver ($MA, $MAC, $MAU plus some which generate serial numbers instead of mac addresses).
Anyhow, all's well that ends well. Glad you got it to work OK. The 941/2's are not bad phones, the only complaints we get are that they are a little on the quiet side and you can't turn off the missed calls indicater, which is a pain if the phone is in a ring group.
Best
S