The search for quartic anomalous gauge couplings at LEP requires appropriat
e predictions for the radiative processes e(+)e(-) --> nu<(<nu>)over bar>ga
mma gamma, e(+)e(-) --> q (q) over bar gamma gamma and e(+)e(-) --> 4 fermi
ons +gamma. Matrix elements are exactly computed at the tree level, and the
effects of anomalous couplings and initial-state radiation are included. C
omparisons with results and approximations existing in the literature are s
hown and commented. Improved versions of the event generators NUNUGPV and W
RAP are made available for experimental analysis. (C) 2001 Published by Els
evier Science B.V.