just thot id interject here...
your phone has a track ball,so its possible it uses that to select things in the hboot menu. i find it hard to believe that your power and vol buttons are now not working in hboot,if they were fine before. give the phone an hour or more to charge,and then try and select things again.
from this info,looks like you are in
fastboot
BUZZ PVT SHIP S-ON
HBOOT-1.01.0001
MICROP-0622
TOUCH PANEL-ATMELC03_16ac
RADIO-3.35.20.10
Nov 17 2010 12:08:53
FASTBOOT
<VOL UP> to previous item
<VOL DOWN> to next item
<POWER> to select item
BOOTLOADER
REBOOT
REBOOT BOOTLOADER
POWER DOWN
did the phone power on into this mode,or were you able to select it?
in order to run the .exe file,you will need to start the utility with the phone in fastboot mode. this will be evident by the words
fsatboot usb with the phone plugged in.
if you are not able to get to this mode,you can also extract rom.zip and install it from the sd card,but we dont want to overwhelm you with directions at this point,so well cross that bridge when we come to it.
to recap:
1)did the phone boot to the screen above when you powered it on,or did you select it?
2)let the phone fuly charge,and try fastboot/hboot again with vol rocker,power,and trackball
3)only once phone is fully charged should you try and run the .exe,and be prepaired that it will wipe all your data and leave your phone in an "out of the box" state.
carry on...