'find'ing a file via php?

Hi gang, I have a weird one for y'all. I need to read the contents of an ini file into php. No problem there. The problem is that the ini file might be ...well, *anywhere* on the user's hard drive. It has to exist where the program is kept, ie: D:\files\myprogram.exe and D:\files\myprogram.ini but other than that, it could be anywhere. There could also be a network copy of the file, but not of the exe file. So I can do an if/then as far as looking for a directory that contains both myprogram.ini and myprogram.exe, but I haven't a clue as to how to locate this directory in the first place! Is there a way to use the window's 'find file' and/or the unix 'find' command to locate the directory that 'myprogram.exe' is located in? I know I could maintain a 2nd copy of the .ini file for php4 in a certain directory, but it would be nice to not have to remember to change both files. TIA, /vjl/ [who's going to spend this weekend coding...]