I am not familiair yet with IPO. Someone care to explain please?

So I send BTC to a generated address and get an e-mail in return with 1: a keypair or 2: a wallet.dat.

Then what? I believe there is no wallet out yet, correct? So what to do with the keypair or wallet.dat until wallet is ready? When is wallet planned for release?

In case of 1: keypair: how do I import a keypair? Any suggestions for a good tutorial? I do not want to lose BTC.

In case of 2: wallet.dat: if I mine syscoins too I presume I must use wallet.dat from IPO before generating addresses to receive mint syscoins ?

What do you recommend, keypair or wallet.dat?

In short, when do I have coins in my own personal wallet after purchasing in IPO?

Thanks in advance for the help.