As product analysts, part of your job is to test new functionality and bug fixes.  You frequently encounter situations where the code is fixed but will not be rolled into a standard testing environment until some future date.  

Test your Form
Menu:Help-->Diagnostics-->Examine
Block : $PROFILES
Field : APPLWRK
Value : e.g /home/ptian/temp/

Test your Library(pld) changes: (in R12)
Menu:Help-->Diagnostics-->Examine
Block : $ENVIRONMENT
Field : FORMS_PATH
Value : e.g /home/ptian/temp/:

Test your Library(pld) changes: (in 11.5.10)
Menu:Help-->Diagnostics-->Examine
Block : $ENVIRONMENT
Field : FORMS60_PATH
Value : e.g /home/ptian/temp/:

Profile:FND: Override Directory
Profile Purpose:Instructs the application to check in the specified directory when looking for a requested piece of code, such as a form or report, before using the code in the standard directory tree.
Value : e.g /home/ptian/temp/XXX.fmx