Dreamcrusher, or whoever else it may concern.
To change the lock slider i opened the UOT-xx-xx-xx-xx-x.zip with winrar and navigated to \framework\framework-res.apk\res\drawable-hdpi
in this folder you will find tons of pics used for the theme. what i did was extract a copy of the whole folder to use as refrence. i would modify the images i wanted from my refrence folder (for the lock slider it is nec_btn_lock_slide.png, and for the status bar it is nec_statusbar_background_vertical.png)
Now once you modify the images (i use gimp) go to winrar where the big list of pictures are, right click and choose "add files to archive" choose the modified files you made and add them. they should replace the stock ones as long as you keep the same name. Remember, you arent unziping the file! (except if you choose to make a reference folder, but it is just for reference)
back out of winrar and it will prompt you to update the .zip, do so.
once you are done, flash it just like any other theme
keep in mind if you are changing your status bar color, the clock does not change color. This is fine for me because i use a clock widget on my home screen and the lock has a big clock.
also the lock screen slider is the same as the call answer slider, which i dont mind because when people call me i get to slide mario over to answer it for me haha.
here is a short video of what i currently have going on, notice the black bar in froyo
(not shown, red battery bar, custom download bar, yingyang loading wheel, ect...)
Froyo commando custom theme - YouTube