at home, plug.. outside, fully on battery.. there's no point leaving the power on whole night if the battery is full. i believe it wont charged.

becuase you never move the image of application (says your Mac MSN) into application folder

no need. that's the nice thing about virtual machines, u dont need to mess around with partitions and formatting and stuff. virtual machines kinda boots another OS on top of a 'fake' (hence the name virtual) system.

it will create a file that contains the whole OS, as if its another computer. if one day u want to remove it, juz delete the file. no hard disk erase or anything. very simple to use, n a great way to 'experiment' with other OS

other alternatives include Parallels Desktop and Sun VirtualBox (free). in my opinion, parallels is the best well worth the money

PREVIEW is a very good image viewer,if you want to view everything in one folder shift select everything in the folder and click on them,you get everything organized fr viewing under preview!

if juz purely for viewing, i normally do this. select all and quicklook... click on index sheet then 'pinch out' (how do u call that motion anyway) to go full screen. u can view between pictures by tapping the arrow keys

Its better to leave it on.
If you switch on and off, it will reduce the number of battery life cycles...