[Perlfect-search] Treating underscores as spaces

[Real Martel]

Hello fellow-searchers!

I run the MidiMansion (http://midimansion.no-ip.com) and thought I'd use the
perlfect search on it. (http://midimansion.no-ip.com/search.shtml) Turns
out, it works on some cases, and doesn't work on others. Here's an example
of working:  Do a search for all words on "abba eyes" without the quotes,
and that works. Most likely because eyes.mid is a song in Abba folder.

However, do a search for all words on "angel eyes" and it doesn't return any
hit, although there is a song called angel_eyes. I am guessing it is missing
it because of the underscore. Is there a way to change the script so that
underscores are treated as if they were spaces, or word delimiters?

Thanks in advance!