Hi, I'm not sure where your "Roaming folder" equivalent would be, I'm a windows user. If you google search, you can find out where you can find your wallet.dat file is located and that's where your .conf should go.

Quick search results:
https://bitcointalk.org/index.php?topic=36542.0
http://bitcoin.stackexchange.com/questions/1350/where-is-bitcoin-information-wallet-dat-stored-on-os-x


Here's my .conf

addnode=54.235.70.55:18872
addnode=54.235.244.167:18872
addnode=167.114.27.243:18872
addnode=92.222.24.66:18872
addnode=1.34.180.245:18872
addnode=213.162.108.2:18872
addnode=73.33.254.6:18872
addnode=88.102.206.204:18872