monitoring the filesystem for changes

[rohit]

hello,
i have designed a desktop search utility in python and a file system
monitoring using readdirectorychangesw from win32api but for eg. it
has a high cpu utilization (using a 2GHz processor).
a solution ntfs change journal proposed here works only for ntfs
partitions
is there another low (processor) cost alternative that works on fat32
partitions as well.
Rohit