I'm almost there.  Trading through independent reserve, have some assets in sites, made my deposits etc.. Now I need to make a purchase..
That part is easy ..

The thing I can't figure out is, how on earth do I use a wallet?   Do I refer to it during the transaction (buying bitcoin or altcoin) does the exchange I'm using ask for it, or... do I copy and past data into it?  (lol)..

I have not idea how to use one of these things.. What happens when I want to sell my altcoin as well?

I'm using Coinomi!

Any help would be greatly appreciated.

Thanks