writing spl or os rom images using mtty? can this be done

[bem]

All,
I have a 6800 on USCC that I decided to take the plunge and upgrade the other day. Long story short. I didn't do it right. I ended up installing a custom winmo 6.5 rom before unlocking the phone or installing the correct radio. The current spl,radio,os rom versions are as follows:
bootloader: SPL-1.07.0000
radio: 1.64.00
os: customer winmo 6.5 cooked in buildos

I am reading about the ability to write data to the phone using mtty. I wanted to know if there was a way to do one of three things to my 6800.
1. write a new spl that is unlocked and would allow for custom roms to be installed
2. cause the phone to boot into a soft spl so that I can install a new unlocked spl and then install the needed custom roms
3. write a dumped os rom that is from a stock uscc phone to memory to boot into winmo 6

There may be other options that I am not exploring and if so please let me know and I will consider them. I am really trying not to have to buy a new phone. I do have insurance on it, but at this point I do not think they will look kindly on me when they boot it and see a custom boot splash / sub splash. Thank you in advance to all of your help and suggestions. Also thanks to drewcam888 for his patience with me while explaining my phone problem.