how to locate a php file

[ezcurrax]

i want to modify a few things of sugarcrm and need to know what file ( .php) is the source of the pages i am using ¿how can i know the name of the file i have to modify? i have to modify the form search contacts launched launched from the prospect lists and this launched from target list....
thanks for your help

[clint]

If you are modifying forms, I would suggest starting with Studio as that is the tool for modifying form layouts and creating custom fields. See the Administration Guide for details on configurations and changes you can make without needing to modify files.