OS X proxy question

All,

I'm currently using R 2.0.1 on a Powerbook G4 with OS X 10.3.8. So far
the only way I've found to set my proxy is by doing 
Sys.putenv("http_proxy"="<insert proxy url>:<proxy port>)  everytime I
start up R.

This works fine, but I'd like to find a solution that doesnt require
manual input everytime I start up R. Does any one have a better way of
accomplishing this?


Thanks,

Drew Balazs