Hi AES,
SRST Version 4.0 adds support for the 7941G and 7961G. Have a look;
Version 4.0 - 12.4(4)XC
The following IP phones are supported by Cisco Unified SRST 4.0:
Cisco Unified IP Phone 7902G
Cisco Unified IP Phone 7905G
Cisco Unified IP Phone 7910
Cisco Unified IP Phone 7911G
Cisco Unified IP Phone 7912G
Cisco Unified IP Phone Expansion Module 7914
Cisco Unified Wireless IP Phone 7920
Cisco IP Conference Station 7935
Cisco Unified IP Conference Station 7936
Cisco Unified IP Phone 7940G
Cisco Unified IP Phone 7941G, Cisco Unified IP Phone 7941G-GE
Cisco Unified IP Phone 7960G
**Cisco UnifiedIP Phone 7961G, Cisco UnifiedIP Phone 7961G-GE
Cisco Unified IP Phone 7970G
Cisco Unified IP Phone 7971G-GE
From this good doc;
http://www.cisco.com/en/US/products/sw/voicesw/ps2169/products_configuration_guide_chapter09186a00806674d2.html#wp1375417
Hope this helps!
Rob