Depends on u wan it as a cab file without flashing it (which was said to be more lag and unstable) or flash to a custom rom that comes with it (this way u will need to void the warranty but anyway u will be able to recover it by flashing back to the stock rom to gain back the warranty)

These info above is from what i read. never claim a warranty before yet.

These info below is from rkwan which i found particular useful in previous post:

in general:

ROM -> is a package of containing windows n files of a PDA. it is exactly the same the is called FIRMWARE for other SE phone. ROM can contain different version of windows mobile and a lot of 3rd party stuff like TF3D. newest rom version as i post now is WM6.1 build 21042 and WM6.5 build 21501.

HARD-SPL -> is something like security unlock your device so that u can install 3rd party ROM. but, this step must must be very careful. if u fail it, u will brick your phone permanently! u can refer to the link i posted on 2nd post for more info bout it.

.cab file -> this is a installation package for each software u downloaded. u can copy this .cab file n use file explorer inside windows mobile to install this software u downloaded.

best is still recommend u download 3rd party rom that is already have integrated TF3D inside. that will be have least bug compare than u install .cab of TF3D.

@arvinddakshen

http://www.xperiax1.net/forum/how-tos-tuto...m-updating.html

i hope this link can help u..

based on my experiences, im sure u dun wanna use the cab install Tf3D after u try it..totally buggy, slow n its a time eater, took a hell long time to install or uninstall..

n bout the custom rom flash, there're the risk  but i think no1 yet from here had bricked his phone, am i rite?

i believe most of us r using wm6.5.. so far i only know yeelin04 not using any 3rd party rom.