Cisco rommon priv - estimating password from cookie

I have a  2611 router that I need to change some rommon privilege mode things on, to do so I need to attain its password.

I've been told I can do this from its cookie.

Using this formula: (i1+...+i5) mod 2^16 where i1...i5 first five words in cookie. I'm not sure if this is accurate but if it isn't, if someone knows the correct way to do it please tell me.

My cookie is:

01 01 00 10 7b b2 e6 a0 43 20 00 ff 00 92 00 20
00 00 00 00 00 00 00 00 4a 41 42 02 32 30 30 59
35 02 02 00 00 00 00 00 00 ff ff ff 50 06 49 0b
18 0b ff ff ff ff ff ff ff ff ff ff ff ff ff ff
ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff

I am not very good at math, but I need to figure out this equation to attain the password, and I need to find out if this equation is correct.


Here is more detailed information about the Equation:

http://www.netxsys.com/useful/ers.pp.ru/cisco/priv.html

Please Help.