[HTC Wildfire S] Lt.Win:
Update 2: I've removed all the Method 1,2,3,etc. and added one universal method instead. Advanced, risky one kept.

Update: I've improved the thread, added pictures and what not. Hope you all like it now. :)

I'm not responsible if your phone blows up, bricks, sd card malfunctions or whatever during this tutorial! :)

Prerequisites:

A Locked Bootloader

RUU of the radio and / or HBOOT you want.

ADB installed

HTC Drivers

Goldcard (Steps at the end of the post)

Alright, then let's begin.

Download the Bootloader Control tool from this thread. (Thanks theq86!)

Put the zip on the root of your SD card.

Reboot into recovery and flash it.

A Menu-type thingy will appear. It will show you 4 options:

Unlock Bootloader

Lock Bootloader (Guarantee Mode)

Lock Bootloader (Relocked State)

Supervision

Now, what you have to do is, choose either the 2nd or 3rd option.

Then say "NO" to reboot. Go back to the main menu of CWM.

Advanced > Reboot Recovery.

It'll reboot the recovery and get you the main menu again.

Again go back to the bltool and this time, choose supervision.

After that, reboot back to the bootloader and into fastboot.

Download and get the latest RUU, that contains the newest radio and hboot: http://www.4shared.com/zip/gsk9viET/RUU_Marvel_S_Vodafone_UK_22616.html

Let the RUU do its job. After everything's done, your phone will reboot. (You will be factory reset, of course.)

And you'll have the latest Radio and HBOOT.

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ADVANCED!:

Instead of using the RUU, if you just want the radio and nothing else, follow these steps:

This is not tested by me and I am not responsible if your phone blows up, bricks, etc.

Let the RUU open up till the I agree screen. (Picture above)

Now, open up task manager (Ctr-Shift-Esc / Ctrl-Alt-Delete) and go in "Processes".

Find a process called ARUWizard.exe. Right click and "Go to location".

You'll find a bunch of files and a rom.zip inside. Copy it to wherever you want, rename it to PG76IMG.zip and put it on the root of your SD Card.

Then reboot your phone to bootloader. If all goes well, it will tell you its flashing. It will first flash the HBOOT and radio. Then, it will reboot.

**PULL OUT THE BATTERY WHEN YOU WILL SEE THE RECOVERY SCREEN AGAIN AFTER 1st RESTART (NOT SOONER!) **

And if everything was good, you wouldn't have lost your data, and you would have the latest HBOOT and Radio.

Thanks to Yasounet for this.

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HOW TO MAKE A GOLDCARD:

Use this to create one: http://www.mediafire.com/?hdxoe6e5km434tb

If you want to know when the SD card should be in the phone and / or in the reader, do this: (Refer to the Steps when you start the SimpleGoldCard software)

Step 1 of Software - SD should be in an SD card reader OR Set the phone in disk drive mode.

Step 3 of Software - SD should be in the Phone OR disable disk drive.

Good luck and Happy Flashing!