Hi,
Flirc works only as a keyboard and can't be used as a mouse - at least not directly. You can use an application which allows to control mouse cursor and buttons with a keyboard and configure both Flirc and that app to use the same keyboard key combinations.
Links to search results for controlling a mouse with a keyboard (native or with AutoHotKey or with EventGhost)
https://www.google.pl/search?q=control+mouse+with+keyboard
https://www.google.pl/search?q=control+mouse+with+keyboard+ahk
https://www.google.pl/search?q=control+mouse+with+keyboard+eventghost