I have installed the gallery everything works sweet but my problem is that i cant edit the categories description.
For example i have a section called "Media Section" and as a description i have "Under Construction", now that im ready to use it and upload files I can't edit the description.
How can i delete the "Under Construction" text to something else?
go to category manager, click the "edit" icon next to "Media Section", wait for the page to reload, scroll to the bottom, edit the description, save your changes. Read the docs for details...
yes i know, but still it dosnt do anything, in which .php file do they go in ?
They are stored in the database. Don't edit that unless you know what you're doing. Try upgrading your gallery to 1.4