simultaneous apache 1.3x & 2.x

[robin at reportlab.com (Robin Becker)]

I'm trying to install squirrelmail, but it seems that PHP + apache 2 + 
squirrelmail doesn't go. I tried and although the install proceeds I get 
  crashes in PHP.

PHP appears to deprecate apache 2 at present and looking at the 
squirrelmail requirements it seems that apache 1.3 is the natural version.

Unfortunately this freebsd 4.9 system is also required to serve SVN so I 
must keep apache 2.

So can I get both apaches working on the same system? Or perhaps someone 
has some advice about getting squirrelmail working with apache 2.
-- 
Robin Becker