No worries! What you could try for borderless window is a program called, shockingly, Windowed Borderless Gaming. http://westechsolutions.net/sites/WindowedBorderlessGaming/
You could try that in conjunction with the magnifier. It requires a bit of tweaking to set it up but I've used it before in games that don't have dedicated support for borderless.
There are probably better magnifier applications out there too, with overlays maybe? Can't really recommend any though as I haven't had to use any.
I'm not sure about this - but to be clear: the issue has nothing to do with the game directly (you haven't installed it), but more to do with the zipfile?
I do know that 1gb+ zipfiles, when zipped up on a Vista or a 7, when unzipped on XP can go all screwy. That's not the fault of the game/any game/any file, but the hard, sad fact that things have moved on from XP. (I just did a check - and oh god I feel old. XP was released over ten years ago! I remember the good old days of Windows 3.1.1 - XP still feels current to me).
If that's the case - 7-zip and WinRAR are the recommended tools for such cases - so if they aren't working - well, I don't know if I can offer any useful suggestions! (Apart from get Windows 7).
Regardless of all that - post here: http://www.goldhawkinteractive.com/forums/forumdisplay.php/12-Xenonauts-Bug-Reports - so you can at least talk directly to them to seek help.
Lastly, looking at this http://www.xenonauts.com/system-specs/ - the spec requirements are rather light, and they do say they will refund anybody who has issues - so as long as you are able to provide evidence that you paid for it/contributed via the kickstarter (either/or), I'm sure you will get a refund.
There are 2 gameconfig files:
...\steamapps\common\Xenonauts\assets\gameconfig.xml
...\steamapps\common\Xenonauts\assets\mods\xce\gameconfig.xml
If nothing else works you could edit the money directly in memory while you play. There are tons of utilities out there, like ArtMoney (I haven't tried it).
Be very careful, some of these utilities could get you VAC banned, and you don't want that.
Just gave the kickstarter demo a try under Wine and it ran like a dream.
I use WineBottler, currently using version 1.1.44
Edit: Whoops, just realised this was two months ago..