Once you have made the make object collision box you can do something like:
if (object collision(id,0)) then print "BOOOOM!"
and if you want automatic slide collision:
if (object collision(id,0))
cx# = get object collision x()
cy# = get object collision y()
cz# = get object collision z()
position object id,object position x(id)-cx#,object position y(id)-cy#,object position z(id)-cz#
endif
if you want your object (id) to collide with more than one object at the same time, change the if command for a while command, but take care of this!