multiple versions of maxima



Hello:

I have maxima-5.17.1 installed and I also have a copy of sage installed 
that has its own version of maxima that is an earliar release. How can I 
maintain both copies without conflicts. The copy of xmaxima that comes 
with 5.17.1 is seeing the earlier release when I start it. I tried 
/usr/local/bin/xmaxima -u /usr/local/maxima, but that didn't work.

Thanks in advance for any help you can provide.

Paul Bowyer