It's not that difficult. To go to the boot loader screen, first switch off the device. Then press and hold camera button and while holding it switch on the device. A tri-color screen comes and that is the boot loader. Now, connect your device to the PC, then flash any of the appropriate ROMs available in this forum. But MAKE SURE that you have already done Hard SPL. How to do the same is given detailed in the stickies on the forum. Once you do that, you can go ahead. Do not worry about radio and all, as most of the roms already have it in. But, please be very careful not to brick your device, for which you have to read all the instructions prior to flashing any rom.