I can't make any changes - sorry! I have NO creative skill!!!

I just save all the designs in case the designers take them down. Try triplefigs - see if she's still out there and could maybe help you?
As for the black mickey heads with our names and favorite characters? rumblytumbly did these for me, but she's not designing right now. I did see some other designers offering the mickey heads.
I used HP transfer paper for light fabrics and it did NOT wash up well at all! One wash and it was peeling off.
I get all my shirts from jiffyshirts.com. They are super cheap but you can get Hanes Beefy T's for about $3 or $4 so it worked out great! Now the transfers I used for the dark shirts were June Taillor for dark fabric and after nearly a year, and wearing the shirt around the house, it is still in great shape!
I don't like working with the transfers for dark fabrics, but they do seem to hold up better for me. But I like the way the transfers for light fabrics feel on the completed shirts.
As for the envelopes, I set my printer to #10 envelopes, but they never seem to line up and fill the entire envelope.
I'm an addict when it comes to this stuff - I thought my husband was gonna divorce me after our big trip back in May! Now I just do the ocassional tsirt or dining invitation for us. But it's so much fun to do! And the Epcot pasports were a huge hit for DD and my nephew!!!!