Hi Scott,
I'm a am new to this and I found that creating an ibay, downloading the file in windows and saving it accross the network to the shared ibay directory works for me. I then navigate to the ibay in the e-smith command prompt and "rpm -iv xxxrpm" to intall the package.
I allow remote private access via ssh telnet using the e-smith web-console to use a telnet program called 'putty' to do all command line stuff on e-smith. I find this better as you can copy and paste commands from web sites on the windows macine's web-browser into the e-smith console.
Hopes this helps.