N8 base snapped - now both screws rounded!

After months of happy camping with the N8 I had a major problem the other day when two things happened at one - the N8 completely crashed and one of the bottom plastic clips that connects the base section to the phone snapped leaving only one screw holding the bottom on.

I was on a 10 day job in the field and needed my phone all the time!  As the phone was completely unresponsive (with a weird flipped horizontally screen display with only the clock displaying, as through looking in a mirror) I had no option but to try and remove the battery to reset it.  After rounding both screws to smooth bores (!) I eventually gave up and had to snap the base off.  I removed the battery and put it back together with some gaffer tape and it's all good now.  But...

Anyone got any ideas how I can remove the screws?!  And is it just a case of removing the screws and replacing them and the base? (ebay).  I read somewhere that one shouldn't ever fully remove these (stupid, annoyingly soft metal, proprietary crap) screws?

Any help appreciated

There are screw drivers called torx screw drivers that you can use to open the screws for the phone. Also, you could have pressed the power button for about 8-10 seconds. This will turn the phone off even if it's unresponsive. This is actually a feature of the phone in case it becomes unresponsive. You won't have to take the battery out.