Question about serial ports and 2 files in one....

Hey guys!

Plz, anyone know if this 2 things are possible to do with VB....
I need to do some stuff for a client and I will need do something like it...

1- Vb can send/receive information trought serial port as com 1,com 2 or usb... etc.. any port? =-)

2- Theres a way to put 2 or more files (any kind) in one? Like Can you create a proccess that gets 2 exe and put in a file with a new extension and them make the opposite.. Get this one file, and extract both exe from it?

Thanks in advance

Elminster