I edited my initab to start using entrance but looks like i copiled entrance wrong. I had set my runlevel to 4 and now i cant get it to go back to runlevel 3 to edit anything. I have tried ctl-alt-f3 with no luck. I cant seem to get it to go into runlevel 3 it just kinda hangs at runlevel 4 with a black screen. How can I get it back to runlevel 3. Is there a way with one of the install discs? or something else? i need to edit what i screwed up but i need runlevel 3 so i can use nano...

By default on runlevel 4, only console 6 is enabled (CTRL+ALT+F6)

You can try entrance without running runlevel 4, just run it from level 3, if it works, edit inittab

Try one of the other function keys (F1, F2, .. F6) in combination with <ctrl><alt>.
If that does not work, start your machine in single user mode.
To do so, reboot your machine. When the lilo screen appears, type the label-name that you use to start linux (on a standard Slackware 10.0 box it's Linux) followed by single and press <enter>.

If you run grub, interupt the boot, edit the kernel line and add the runlevel at the end. Then enter the "boot" command.

If you use lilo - SOL.

If you boot to runlevel 4, you are in runlevel 4 (seems obvious enough). Ctrl-Alt-F3 does not take you to runlevel 3, it switches you to Vt3 (Virtual Terminal 3). As gbonvehi points out, there is Vt3 on runlevel 4, only Vt6 and of course Vt7 (your X server).

So if you just need a terminal: Ctrl-Alt-F6

If you need to change to runlevel 3: telinit 3

Note that what I am telling you is that there is no need for re-booting. Single-user mode is "telinit 1". Multi-user (no X) is "telinit 3". Multi-user (with X) is "telinit 4". No need to go around editing stuff and rebooting just to get a new runlevel.

Bonus info: You can't install the Nvidia driver with X running. This is one good time to "telinit 3" if you usually boot to runlevel 4.

Also, you can run nano from runlevel 4. Use a terminal emulator (xterm, gnome-terminal, etc.). Or just use Vt6 (like gbonvehi recommended).