I got my Sony Ericsson Vivaz two days ago and I love it!

Only problem is the themes, I downloaded some themes off my internet on my laptop that are meant to be for the Vivaz and I really want to use them, only I don't know how to get them on my phone.
When I connect my phone to my laptop it gives me the option of "Phone Memory" or "Memory Card" neither of these contain a "Themes" folder, any other Sony Ericsson that I have had gave me that option.
Any ideas on how I could get my themes onto my phone?

Thank-You