sekrad 0 Newbie Poster

I am working with a software company for almost a year. I have created some flash games and some tools at my hobby time. I have been doing this since my college days and a few of them have reached a near completion. I would like to know if I can copyright these and make business out of it (business i mean here is not making money - but legally establish ownership for my creations - still continuing my present job). These are not BIG softwares - though worth displaying.
These hobby-wares have no relation at all, to what I work for my present company. Is it legally possible to - BOTH - work for a company and to establish a sole proprietorship as well.