im thinkin you are a little bit confused. there is only one way to root the phone,and that way uses the app "gscript lite" to run the 2 files wich root your phone,then install the custom recovery needed to flash the roms.
xtrsense is a ROM,not a method of rooting. please note that you do not actually have to flash a rom as part of the rooting process. as metlcatsaid,you will follow the directions/pictures until figure 38. at this point,you can simply click on "reboot system now" with the tracball and boot back into your stock,but rooted, rom. after reaching this point,you have the option to download and use titanium backup to backup your apps. as was said,get the paid version as well,as it makes things a BUNCH easier when switching roms around![]()
if you do want to change to a new rom,continue to figure 40,at wich time you will select xtrSense that you have previously placed on your SD card.
make sure all your contatcs are google contacts,and not phone contacts. that way when you sync with google,they will all come back. go to settings/accounts and sync/ and sync with google after chaging everything to "google" contacts.
as for the apps,if you boot back to your stock rooted rom at figure 38 as i described above,it will let you dowload titanium for root users and back up your apps. that way when you change your rom it will be easy as pie to restore them.
hope that helps clear up a couple things![]()
Well said.

Do you have the rom of your choice downloaded and in the root of your sd card? The rom will have the superuser app in it so after you flash the rom then you can use TiB.