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I don't believe Fenix mod includes RPGmod, but i could be wrong.
You can read some info about RPGmod including where to donwload it
here.
However, the ability to jump to different levels is achieveable in Stock (Unmodified) FPSC. You will need to customize the winzone scripts using the "nextlevel=" command. For example, here is an example of a winzone script jumping to level 18:
;Artificial Intelligence Script
;Header
desc = Plr In Zone
;Triggers
:state=0,plrwithinzone=1:nextlevel=18,activateallinzone=1,sound=$0,state=1