How are you doing it ?
Some plug ins and VSTi's will give you a "named" list of parameters, like dimension pro, if you right click in the
audio track and choose envelopes you'll see dimension pro listed, clicking on that will give you a list.
Other plug ins have to be automated via NRPN and they will be numbers which you need to assign within the plug in. I'm guessing it's those that you're talking about ?
I'm not keen on that method either but I don't think there is any other way. I don't know if it's possible and I did submit it as a feature request a few years ago but if sonar allowed us to right click an envelope and name that envelope that would be a big help for me as I often forget which envelope is doing what.
Which plug ins/VSTi's are you using.
Another method is to have a midi controller and use, "midi learn" then it will automate whatever knobs and faders you move in real time and record them.
Others may give you a more technical and thorough explanation but I think that's roughly right
Steve