How to change donation address of p2pool
It is a multisignature 2-of-2 address.

I have annotated the script:

scriptPubKey length: 51
Push the following 33 bytes onto the stack: 21
Compressed public key: 0241b8aba0994f320a8b438c627dbf31fbdd7dc722dd8418d829d67a9c6e4fd690
Push the following 33 bytes onto the stack: 21
Compressed public key: 036fbd9d0a34a569f10b0431c8aeecf74ad796b99838b7272ef35ded130a794f9b
OP_2: 52
OP_CHECKMULTISIG: ae


If you change DONATION_SCRIPT[2:35] to your own compressed public key, and DONATION_SCRIPT[36:69] to another compressed public key, that should work.