[Morglum007]

Standart .cab are handled by CabARC ( DOS and originally how Microsoft cabinet files are created).
Installshield cabinets are handled easily with iXComp (i5comp/i6comp), but this is heavyly installation dependant (Sometimes it is needed some tricks in order to insert or "replace" an original exe inside such file).
Anyway, Grumpy (and others), u should read at CdSTeam. This have been discussed long ago and have a lot of solutions. It is quite easy to manage a cabinet file ( when u know what u should touch)

morg.