/etc/profile and PATH

[Miguel Cárdenas]

Hello list

I have set some environment vars in /etc/profile such as PATH QTDIR (for Qt) 
LD_LIBRARY_PATH etc. All variables are setup successfully except PATH that 
remains unchanged...

I tried to setup PATH in ~/.profile and now is updated but how can I setup 
this variable system wide? specifically want to add the Qt and MySQL binary 
directories to the PATH...

Thanx