Hybrid cnc mill / 3d printer help

Hello there,
I'm building a cnc /3d printer hybrid using alum. extusions fot the frame and ramps 1.4/mega
I already had a cnc made from mdf and runs on parallel port with mach 3 but had to deassemble it as I moved to a new house and have no room for its large size so I resorted to making a smaller one but wanted to make it a printer as well
The problem I have right now is with the firmware for ramps
As I want the cnc to have a 4th rotating axis
I choose repetier as it supports both cnc and printing
But can't find any tutorial on a 4th axis for it
Even grbl which I read that is the best for cnc milling don't support a 4th axis
Is there is a firmware capable of controlling a 4th axis on ramps?
Or should I use the old parallel port board for cnc and ramps for printing as a dual setup on the same machine?

All repraps have 4th axis... ie X,Y,Z and E

So you actually after a 5th axis

Only one im aware of is a branch of teacup [github.com]
No idea how well it works or otherwise.. Just know it exists

You could of course just use Tools

E0 connected to normal extruder
E1 connected to another axis

as long as you can put a T1 at the begining of you gcode E will just be annother axis (may need to disable cold extrusion also and extruders are tied to temperature interlocks)

Thanks for the reply
I'm not an expert when it comes to gcode
So I want to understand the t1 command thing with a bit of an explanation
Should I put a t1 in every line containing a command for E1?
Do I have to do it manually or this done in the firmware?
And the axis will be a rotating one,and I read it to has to be converted from mm to degrees in the firmware
How can this be done?

T command just change the tool [reprap.org]

on a standard reprap E0 and E1 are the same E axis, you switch between them with the T0 and T1 commands

so all E moves are moves on E axis Not E0 or E1

Ie to use E1 you just need a T1, once at the beginning of your gcode then all code that references axis E will use E1
and to use E0 you just need a T0, once at the beginning of your gcode