I want to make a "savings account" wallet to keep the bulk of my btc in, but I'm scared to do it, cause I'm not very tech-savvy and the cost of screwing up is huge.. So I want to ask: I have the main client currently installed on Windows 7, and the data dir is in the %appdata%\Roaming\bitcoin folder. (My first was installed using the binary installer.) Can I just download the Windows zip file from bitcoin.org and place a completely new installation elsewhere on my computer? Or will that mess things up having two installations of it? Obviously, the "new" location is going to be a Truecrypt file container either on a thumb drive or in my Dropbox folder, but again, I'm worried about doing this because I don't want to mess things up.
Should I instead not even bother and just delete the wallet.dat file (after making a backup of course!) and replace it with a new one and run bitcoin with -rescan? Then replace the original and just send my btc to an address on the newer wallet. Would that work?
I feel like either of these would work just fine, but I'm not 100% sure and I don't want to try it, fuck up, and be screwed!
Now then, I have a second, completely unrelated couple of question. The first one is, is there a way to verify an address is an actual address. Like I want to verify that the address is real and exists without sending money to it. Is that possible? I saw somebody made a program that does that, and I'm curious how they went about it.
And finally, is there a patch/addon for Windows that can import/export addresses easily. For if I wanted to use BitBills...
Thanks for the help guys!!!