craftgrrl | couple of invitation questions.

I have two questions. I am making my own invitations and I want them to be, of course, perfect. Here they are!

1) I am going to be adhering Kodak inkjet glossy paper onto card stock. Would spray fixative be best or another method?

2) I want to use transparent envelopes and seal them with a wax seal and ribbon. Will this end up melting the transparent envelopes? Let me know now before I do the ordering. ;)

Thanks for your help!