be4 i go off to my term break, here's how to do it step by step to set up ur nexus the most easy way.
changing to yakju and rooting1- download v7 galaxy tool kit here
trollolol2- Install it
3- go
Here and download Factory Images "yakju" for Galaxy Nexus "maguro" (GSM/HSPA+) or just save
this yakju4- navigate to ''C:\Galaxy Nexus toolkit\ put_google_factory_image_here\'' and place the downloaded file
5- go to control panel\hardware and sound\ device manager, look for anything related to samsung galaxy nexus or samsung mobile driver. uninstall it, if not present then continue.
6- boot up ur toolkit, and select 4.0.4, then type the number for the option (install/uninstall galaxy nexus drivers on your PC) installed. reboot computer. while w8ing check ur phone, settings\about phone\android version\ u will see 4.0.2, or some number, remember it.
7- boot up tool kit again, turn off phone. turn on phone again but hold down all buttons u can reach. (vol<> and power)
8a- plug phone in computer, in tool kit, select the number u saw in step 6.
8b- optional select the number for "extract and flash google factory stock rom" then folo screen instructions
9- select the number for ''1-click for all'' and follow on screen instructions.
10- folo all steps, when completed they will greet ur with ''congrats u hacked it''
11- sit back reboot and read on
* remember if u saved anything importand in phone, back them up(files etc) be4 u start, sync with gmail and all.
flashing custom rom1- navigate to
here and download ''maguro GSM Galaxy Nexus'' and ''gapps 20120429''
2- place them in ur phone by plugging in and placing them in a folder(remember where u place it)
3- shut down ur phone, reboot phone with holding all physical buttons.
4- press vol - untill the screen shows recovery, then hit power button.
5- cwm screen shows up. select backup/restore, then backup. thats ur pure yakju to roll back nex time
6- reboot recovery
7- select 'factory wipe reset data' and press power
8- select 'wipe cache' and press power
9- select 'install zip file/ flash zip file' then select 1st option and navigate to the files u placed.
10- install this in order= ROM>GAPPS>KERNAL>BASEBAND>ANY OTHER MODS. (u would be flashing ROM and GAPPS)
11- done flashing, then select back and reboot.
12- u are now a unicorn party!
going on break~ tooties~

Added on June 23, 2012, 7:56 pmdisclaimer
*if u go wrong, im not responsible so as the developers involved.
**doing the 'extract and flash google factory stock rom' step will wipe all of ur phone memory, so remember to backup.
*** try other stuff, but remember go folo the unicorns!