This little setup is running a badly hacked version of Isearch from the fine folks at
CNIDR. It works, for suitably small values
of ``works''. However, any problems you might have are almost certainly a
result of Pope Icky's mangling of the code and should not be taken as representative of the work of CNIDR, who after all give Isearch away for free.
One thing that isn't Fundament's fault, however, is the Boolean functionality,
which isn't exactly intuitive. Using ``OR'' will return matches for one or
the other or both search terms; using ``AND'' will return the same results,
only with ``AND'' matches listed first. It's weird, but hardly chaotic.