'Suites you Sir' is a WAD for 'Ultimate Doom' which (like Simpsons Doom) leaves the gameplay unaltered, but changes the sound an graphics.
The 'Exit' sign changes to 'Nice' and the doors have a multi-coloured look with the word 'Spune' painted on them. 'You are here' becomes 'Suites you Sir'. Your character gains headwear and a cigarette, depending on his status. The imps wear shades...
The new sounds include most of the catchphrases from the excellent comedy show - I particularly like 'I'm from the Isle of Man' (Imps). 'Arse' - when some monster is killed, 'Boutros Boutros Ghali' - during fighting, and 'I'll get me coat' when you are killed. The only downer is that the music is not included.
Overall: Get it now - it spices up those already played levels a treat!