Can anybody help me?

I'm using a MAC OS X computer 10.3.9 (may upgrade to Leopard soon when money surface). I want to burn a movie I made to add to my DVD Resume, and need to add subtitles. I NEED to do it two languages. But I can't find any software that let's me do this the easy way. I have DVD Studio Pro (an old version maybe 2), but I don't know how to use it, I don't even know how to burn a basic DVD there.

I've come across ffmpegx but, the software only let's me burn with ONE set of subtitles, and as you know I need two.

I want to add TWO selectable subtitles, one in English language, the other in Spanish language. Is there any way anybody can help me do this. Using any kind software on a MAC, any free tutorial you have. Is there a way burning one way with ffmpegx, and then a second time and adding any file on video_ts folder?

Anything... please! Thank for all your help!

=====MINOR EDIT=====
I'm using two .srt subtitles files.