I'm going to sub something

hello…

i have a vietnam movie with hardcoded subs…so i tried a sub file for it…i converted it to vcd format…but when i converted it to vcd format using tmpgenc…the subs were placed at the same place as the hardcoded subs…which made the subs unreadable…how do i make the subs go lower or higher in the video? like when i want it sometimes on top of the video or something else? i just wanna know how you can make the subs go anyplace in the screen when you convert it to VCD or DVD or avi format as hardcoded text…like i wanna put my name on the left side of the screen on the opening credits as the “edited by oversoul” hehehe… also to change the color of the texts and make the font size bigger…thanks