When did your TS? <-- It's extremely important: Each batch TS has some difference in F/W requirement even they bear the same model name or configuration!
For the Screw thing, throw away the small screw driver OMate provided. It's JUNK! Buy a precision Philip #0000 type (bring your TS to the shop and try). With correct Screw driver, it's VERY EASY to unscrew!!!
If you can pull the battery and re-install the battery, than it goes back to normal, then you are lucky!
If not, you have problem in F/W. you need to reflash the F/W compatible to your specific TS to revive it!
For F/W thing, It seems you made same mistake as me: use the tools on XDA not knowing the OMate made some changes to your TS. So it's not compatible with anything posted here!
Your only chance is to ask someone with same version of TS as yours (same shipping day, like your conference friend, same configuration like 1/8/2100) and ask them nicely to give you a back up... Then you can follow my guild here to restore everything back to normal... http://forum.xda-developers.com/show....php?t=2758733
(You can see my original problem at here if you are interested: http://forum.xda-developers.com/show....php?t=2756455