Help with the php bug in the Squirrelmail plugin's script

Hi I'd like to ask you for the help I'm using Squirellmail with plugin Shared calendar. This is simple nice plugin written by Paul Lesniewski But I found the bug in this plugin. The bug seems to be related with variable and memory. The scripts are really slow and sometimes takes 20-30 seconds under some conditions. Unfortunately Paul is busy and has no time to examine it. Just told me that it seems like there is a problem in that all files are inspected even when it just needs to look for one file. I found out what caused this delay and what action but I'm not good programmer therefore I cannot repair it by myself Can anybody look at this plugin and bug ? I can provide more information Can anybody give me some advice how to proceed? Thanks Pet