Languages and other questions

[Sil]

Hello!

I'm new here but I started to use the script a few days ago and it works like magic, I really like it and thank you so much for it! ^^
But I have some questions about it, I'd love to add some things but I'm not really a programmer, but I think I understand the basics :)

1. - How to add different languages? I've found the lang.php, but how to make it possible to choose between languages for members?

2. - I like to use png images, so will there be a function later when png files can also be used for GD signatures?

3. - I'd love to install a forum for my pet site, but I'd love if the database (users and their passwords) would be the same, so the members wouldn't need to register twice, how can I do it?

I think that's all for now, I hope it's understandable, English is not my native language :)

And thanks in advance!!! Keep up the good work!!!