The answer to your question is easy. It IS posible. The only thing you need is that you have phisical connection to remote computer. Phisical is not right word, but I mean that you have some route to remote computer. NetBIOS doesn't care for workgrups or domains. So if you have shared folders on your computer, beware... someone might just find route to you...
If you need shares, put pwd on them.. make it good one... loooong one...