How to get custom rom to stock rom 2.2.2

Hey,

im new here and a german with bad english. Sorry vor that. My doughter have the pro xt610 with lot of problems, so i want to change to a custom rom. I know i have to root the phone bevor i get a custom rom ( do it to the pro+) but i don´t know if i have update to another officel firmeware first. And I need a rom that realy stable and all things are working (camera,wifi,gps,2g and 3g). Here are the result of the handyinfo :

Systemversion = 342.179.14
Android Version = 2.2.2
Baseband = N_01.1B.00R
Kernel-Version = 2.6.32.9-g167279c
Build = V2U_3.4.2-179

it´s a european version from vodafone germany and it ist unlocked.

Hope of kindly replyes.

thanks