HD to SD and handling talk bubbles question

[perfection]

If i insert a talk bubble into a video, i presume that this has to be done as an overlay. If i add text into the bubble is there a way to group the two to behave as one? or do i have to time the fade in and fade outs of these two tracks individually forit o look synchronised. or am i missing a trick here?

If i insert an HD mov video into the timeline will it render into dvd video PAL 4/3 or 16/9 without a problem or are there some issues that i hae overlooked here about resolution, Pixedl aspect ratio or display aspect ratio or is it just that easy?

[Black Lab]

Start a new project and insert your bubble then add the text in the title track. You would then have to time the fades individually to sync them up. After you have it perfect you can then render this to a video file so it will then be "group to behave as one". You can then insert this video file into your project.

[perfection]

Thanks

...any knwledge about my second question about HD converted to SD