horde on freebsd6

[Dave]

Hello,
    I've got php4 and apache installed on freebsd6 with several php4 
extensions. Now i want to install horde and imp to test them out while 
atempting to decide if horde would be suitable as a webmail solution. I try 
the install via ports, but pear always stops saying the port requires the 
cli or cgi version of php, but i have a conflicting port installed. I've 
already got php4 installed, does anyone have a workaround for this?
Thanks.
Dave.