In TEA you can create your own menu to run some programs or open with them a current file. To edit the user menu go to the File > Manage config files > User-menu config. It opens the user menu configuration file. Edit it and save. The menu will update. The format of this file in a simple one. There are a list with something like:
Opera=opera %s & Kwrite=kwrite %s &
So, as you understand, the "%s"-macro means the current file name. To start some program as a background process, you must add a &-sign to the end of line. Or else TEA in the frozen state will wait for the program termination.