Unfortunately I don't think Live will ever take the filmscoring crowd serioulsy (which is ridiculous.)
Obvioulsy Logic, Cubase, Pro Tools etc are great alternatives - and I'm guessing you use one of these already. I could understand wanting to use live because it can be very quick to work in in many regards... but without timecode it's just not possible ...
I've been experimenting with Studio One lately. I'm digging it. It has an incredibly quick work flow similar to live (linear only though, no session view...) it is 64 bit. runs with a nice light footprint and pretty awesome. Do some reading up if you haven't looked into it yet.
Here's an excellent article by a film composer who's using it: http://www.scorecastonline.com/2012/11/ ... etting-up/