upload your icons to a directory in ~. Add an alias to .profile to copy it over with a command in terminal. Remember these aren't Apple supplied apps. Not sure that being "sick" of what you're doing is all that appropriate
Check out my .profile
Code:
alias iconapolloim='cp ~/.icons/apolloim.png /Applications/ApolloIM.app/icon.png'
alias iconbitchx='cp ~/.icons/bitchx.png /Applications/BitchX.app/icon.png'
alias iconfrotz='cp ~/.icons/frotz.png /Applications/Frotz.app/icon.png'
alias iconibj='cp ~/.icons/iblackjack.png /Applications/iBlackjack.app/icon.png'
alias iconinstaller='cp ~/.icons/installer.png /Applications/Installer.app/icon.png'
alias iconilight='cp ~/.icons/ilight.png /Applications/iLight.app/icon.png'
alias iconishare='cp ~/.icons/ishare.png /Applications/iShare.app/icon.png'
alias iconlightsoff='cp ~/.icons/lightsoff.png "/Applications/Lights Off.app/icon.png"'
alias iconnes='cp ~/.icons/nes.png /Applications/NES.app/icon.png'
alias iconrsbt='cp ~/.icons/rsbt.png /Applications/rSBT.app/icon.png'
alias iconsendfile='cp ~/.icons/sendfile.png /Applications/SendFile.app/icon.png'
alias iconsendsong='cp ~/.icons/sendsong.png /Applications/SendSong.app/icon.png'
alias iconterm='cp ~/.icons/term-vt100.png /Applications/Term-vt100.app/icon.png'
alias iconvnotes='cp ~/.icons/vnotes.png /Applications/VNotes.app/icon.png'