You may be wondering... I just went through all that, now what?
Well now the fun begins!
The HSPL completely unlocks the phone. With it, you can install ROMs from places such as MightyROM, or even radios that may improve your signal quality. Like before, this WILL have risks, but more importantly it will erase EVERYTHING from your phone, so be careful! This however means the gloves are off and that you are not clung to a specific ROM, radio or other feature of the phone. Though done at one's own risk, tethering has been reported as being possible with a flashed phone, not requiring extra fees incurred by the wireless carrier.
Some things to keep in mind however when using your phone:
ROMs you flash need to be flashed using EXACTLY the same method, except you need to enter HSPL (Bootloader) mode first. You can enter bootloader mode by merely holding the power button and volume down button, while using your stylus to soft reset the phone, or first power down the device and press the button combination. If you see the tri-color screen on the right, you are ready to flash,
In the event you need to get back home and return your device without violating the warranty. You must take your phone and flash your ORIGINAL ROM from your carrier (The TP forums have those ROMs) and then relock your device with the relocker file above. Please remember there is always a risk they will detect this and you will not be able to get warranty repairs.
See the TP CDMA Upgrade forum for any questions left unanswered.
Good Luck, and Happy Flashing!