you might want to read about the whole process. Just translating it isn't enough, you gotta do a LOT to make the final thing happen.

I gave a brief intro/overview to fansubbing here: http://forums.gotwoot.net/messagevie...;enterthread=y
You can also find the infusion fansubbing guide here: http://apr.vvv.tf/guide.html which also gives a good overview
Or timecop's digisub guide here: http://pepper.idge.net/digisub.html

The actual point that the subs get put on the video is the encoding step, but you may or may not need to do some steps before it's ready for that, depending on what you have and what you've already done.