You can not launch a Windows based tex-editor to show text from EasyBoot menu! BUT... You can jump to a new menu (with different background) with text you implemented to the background (pasted in to the background bmp-picture) using photo-shop or whatever.
Then create menu command in that 'text-background' to jump back to the menu you jumped from or chose to jump to a third menu and jump from that menu back to where you came from or jump to the 'main menu'.
-------------- Download complete set of scripts including help fileHERE Note: Script collection updated 2019-05-19. Scripts mainly support EasyBoot_6.5 or later