Just type in during gameplay:
 
 allen: radiation suit
 andrewbenson: invulnerability
 charlesjacobi: no clipping
 davidbrus: god mode
 deanhyers: strength
 digitalcafe: all map
 joelkoenigs: bootspork and "eat chex"
 kimhyers: position on map
 marybregi: invisibility
 mikekoenigs: all ammo
 scottholman: all ammo and keys
 sherrill: additional map info