UINavigationController and UITabBarController in Xcode 4 - cocoa-touch

Question

I have made the switch from Xcode 3 to Xcode 4 and my whole work flow pattern is ruined. I made the change because I think iOS 5 will only be able to be developed on Xcode 4.
Anyways, making a UINavigationController with a UITabBarController used to be straight forward for me using the Interface Builder, Now I cant find the correct attributes. It feels like Apple have forgotten certain attributes from the list.
How would i do the equal of the tutorial below in xcode 4.
http://www.xcode-tutorials.com/uitabbarcontroller-and-uinavigationcontroller/
I get a different error
GNU gdb 6.3.50-20050815 (Apple version gdb-1518) (Sat Feb 12 02:52:12 UTC 2011)
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This GDB was configured as "x86_64-apple-darwin".Attaching to process 56741.
2011-06-19 15:58:31.814 FaceDirectory[56741:207] Reachability Flag Status: -R ------- networkStatusForFlags
2011-06-19 15:58:31.815 FaceDirectory[56741:207] Reachable WiFi
2011-06-19 15:58:32.792 FaceDirectory[56741:207] *** Terminating app due to uncaught exception 'NSInternalInconsistencyException', reason: '-[UITableViewController loadView] loaded the "FaceUsersViewController" nib but didn't get a UITableView.'
*** Call stack at first throw:
(
0 CoreFoundation 0x00e315a9 __exceptionPreprocess + 185
1 libobjc.A.dylib 0x00f85313 objc_exception_throw + 44
2 CoreFoundation 0x00de9ef8 +[NSException raise:format:arguments:] + 136
3 CoreFoundation 0x00de9e6a +[NSException raise:format:] + 58
4 UIKit 0x0028ce9b -[UITableViewController loadView] + 275
5 UIKit 0x0013300e -[UIViewController view] + 56
6 UIKit 0x00131482 -[UIViewController contentScrollView] + 42
7 UIKit 0x00141f25 -[UINavigationController _computeAndApplyScrollContentInsetDeltaForViewController:] + 48
8 UIKit 0x00140555 -[UINavigationController _layoutViewController:] + 43
9 UIKit 0x00141870 -[UINavigationController _startTransition:fromViewController:toViewController:] + 524
10 UIKit 0x0013c32a -[UINavigationController _startDeferredTransitionIfNeeded] + 266
11 UIKit 0x002572e9 -[UILayoutContainerView layoutSubviews] + 226
12 QuartzCore 0x01952a5a -[CALayer layoutSublayers] + 181
13 QuartzCore 0x01954ddc CALayerLayoutIfNeeded + 220
14 QuartzCore 0x018fa0b4 _ZN2CA7Context18commit_transactionEPNS_11TransactionE + 310
15 QuartzCore 0x018fb294 _ZN2CA11Transaction6commitEv + 292
16 QuartzCore 0x018fb46d _ZN2CA11Transaction17observer_callbackEP19__CFRunLoopObservermPv + 99
17 CoreFoundation 0x00e1289b __CFRUNLOOP_IS_CALLING_OUT_TO_AN_OBSERVER_CALLBACK_FUNCTION__ + 27
18 CoreFoundation 0x00da76e7 __CFRunLoopDoObservers + 295
19 CoreFoundation 0x00d701d7 __CFRunLoopRun + 1575
20 CoreFoundation 0x00d6f840 CFRunLoopRunSpecific + 208
21 CoreFoundation 0x00d6f761 CFRunLoopRunInMode + 97
22 GraphicsServices 0x013091c4 GSEventRunModal + 217
23 GraphicsServices 0x01309289 GSEventRun + 115
24 UIKit 0x00091c93 UIApplicationMain + 1160
25 FaceDirectory 0x00002689 main + 121
26 FaceDirectory 0x00002605 start + 53
)
terminate called after throwing an instance of 'NSException'
sharedlibrary apply-load-rules all
Current language: auto; currently objective-c
(gdb)

Answer 1

If you're talking about changing FirstViewController from a View Controller to a Navigation Controller - then edit FirstViewController so that the declaration looks like this:
#interface FirstViewController : UIViewController {
I also see that the views and their controllers have already been created and hooked up for you.
Edit
The edited question shows that you haven't set up the view outlet for FacetimeUsersViewController nib