Hi, apologies in advance - I'm sure this has been discussed before but a quick search didn't turn up any similar threads... feel free to just reply with a useful link! 
I'm just doing a new install of MS Vista Ultimate 64bit on a 128GB Samsung ssd. I have a 1.5TB hdd to use for bulk storage and games, and an external 1.5TB drive in a caddy too - so storage space is not an issue.
However, even before WIndows Update has finished it's most recent bout, my install is running at a staggering 30.6GBs!!!
All I've installed so far is Windows itself, all the hardware drivers and Firefox + a few plugins. And WU is still downloading stuff as I type this...
What I'd like to know is what I can do to shrink this massive install size down a bit... I have turned off System Restore but haven't restarted yet (WU is taking *hours* at the moment, literally...). Will leaving this off help? Do I also have to manually delete the backup/restore file image too?
There is another biggish file called hiberfil.sys iirc. That is for when I put the PC into hibernation - I don't usually ever do that. Can I delete this and/or turn off the hibernate function safely? Again, do I have to manually remove the actual file/folder or will Windows do that (on restart, perhaps)?
Supposedly there is/are folder(s) with tons of excess drivers that MS included with Vista but which I don't need - how big is this and can it be safely deleted?
Likewise, what happens to all the update files that Windows Update will pull down off the net all the time? Does MS clean up after itself or can I find and remove those (that aren't needed)?
Anything else I can do that people recommend?

I'm just doing a new install of MS Vista Ultimate 64bit on a 128GB Samsung ssd. I have a 1.5TB hdd to use for bulk storage and games, and an external 1.5TB drive in a caddy too - so storage space is not an issue.
However, even before WIndows Update has finished it's most recent bout, my install is running at a staggering 30.6GBs!!!

What I'd like to know is what I can do to shrink this massive install size down a bit... I have turned off System Restore but haven't restarted yet (WU is taking *hours* at the moment, literally...). Will leaving this off help? Do I also have to manually delete the backup/restore file image too?
There is another biggish file called hiberfil.sys iirc. That is for when I put the PC into hibernation - I don't usually ever do that. Can I delete this and/or turn off the hibernate function safely? Again, do I have to manually remove the actual file/folder or will Windows do that (on restart, perhaps)?
Supposedly there is/are folder(s) with tons of excess drivers that MS included with Vista but which I don't need - how big is this and can it be safely deleted?
Likewise, what happens to all the update files that Windows Update will pull down off the net all the time? Does MS clean up after itself or can I find and remove those (that aren't needed)?
Anything else I can do that people recommend?