First of all, go in settings, in the administration area of WordPress, and make sure you've saved at least once.
Read further and than see the plugin page also.
Well, this plugin use JSON, which I think it's available only with PHP5.
No. This plugin use the API provided by Google and receive the public albums for the account you specify.
Simply: [altpwa user=... album=...] where you put instead of ... the username and the album you want.
Like above, just forget the "album" parameter. Just [altpwa user=...]
It's up to you. You can specify the size and the method: inside the page or "above" using Lightbox.
Well, Lightbox is JavaScript. If the plugin works without Lightbox, it means the plugin is... working. The issues with Lightbox can be caused by different other plugins or the theme you use.
Yep, not showing, no? No problem. Just edit js/lightbox.js and replace www.yourwebsite.com with... of course, your website address.




