Full featured bootable Mac OS 10.7.5 on USB flash drive?

Is it possible to get a full featured bootable 10.7.5 onto a USB flash drive?  I'm can only seem to get it working with the OS installer, disk utility, Safari, and limited access to other features.

Did you prep the flash drive first?
Drive Preparation
1. Open Disk Utility in your Utilities folder.
2. After DU loads select your hard drive (this is the entry with the mfgr.'s ID and size) from the left side list. Click on the Partition tab in the DU main window.
3. Under the Volume Scheme heading set the number of partitions from the drop down menu to one. Click on the Options button, set the partition scheme to GUID then click on the OK button. Set the format type to Mac OS Extended (Journaled.) Click on the Partition button and wait until the process has completed.
4. Select the volume you just created (this is the sub-entry under the drive entry) from the left side list. Click on the Erase tab in the DU main window.
5. Set the format type to Mac OS Extended (Journaled.) Click on the Security button, check the button for Zero Data and click on OK to return to the Erase window.
6. Click on the Erase button. The format process can take up to several hours depending upon the drive size.
Now, run the installer application. Click on the Install button. Click on the option to select another disk. Select the flash drive as the target and click on the Install button.

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