Flash video with seperate sound: anything wrong with this?

I’m developing an interactive CD ROM.
I’m programming in Flash.
I will have video playing with cuepoints.
When a cuepoint is hit, an MP3 file will be played.

I want to know if there’s anything wrong with the above?

What I don’t want is to develop and have fine playing on my PC…
But then have someone play on a slower machine and have sound delay problems.

I can’t think why I should have a problem.
The MP3 files will be sound commentary for the video.

YES: I could simply add the sound to the video.

But… I’d rather not… since the MP3 files gives me more flexibility.

Any help would be appreciated.