Using ssh id_rsa without password - another username

Just had to login to another box via ssh, but the other account has a different username than my current one. Further, had to use a different id_dsa / id_dsa.pub set of files. I couldn't figure this out for a while. Turns out, the right way to do this is:

• generate the keys
• copy the pub key into authorized_keys2 on the remote box
• ssh -i ~/.ssh/privateKeyFileName otheruser@remoteboxname

Pretty straightforward, found out. Kinda cool - didn't know about the -i parameter.