well , i am assuming your using windows , For the sega , i use to love Kega fusion. I found it really easy to set up and use many years ago . You can get it Here
http://www.theoldcomputer.com/emulators ... ega-FusionAs for the play station , i use PCSX . I use the linux version but if you have any problems let me know and i will boot into windows and have a look.
http://www.theoldcomputer.com/emulators ... WIN/PCSX-RTo make it easier to get help in the future , please give us more information. What OS your using , what specific problem you are having and even screenshots can help people understand and solve your issues.
Any problems using these , simply list them here. Also Welcome to the site