When you have to put several entries into
reftex-label-alist, just put them after each other
in a list, or create that many templates in the customization
buffer. Here is a lisp example which uses several of the entries
described above:
(setq reftex-label-alist
'(("axiom" ?a "ax:" "~\\ref{%s}" nil ("axiom" "ax.") -2)
("theorem" ?h "thr:" "~\\ref{%s}" t ("theorem" "theor." "th.") -3)
("\\quickeq{}" ?e nil nil 1 nil)
AMSTeX
("\\myfig[]{}{}{*}{}" ?f nil nil 3)
(detect-linguex ?x "ex:" "~\\ref{%s}" nil ("Example" "Ex."))))