Sony Vegas Vector Import

Hey all,

I was just doing some video proposal for a signage which turned outstanding using Sony Vegas 11, I was just wondering what it everyones approach to vector graphics import,
I hade very little time to experiment so what I did from corel draw converted all my logos and objects I wante to flow in vegas into PNG format with transparent background...
I was working in 1920 x 1080 res when I imported the PNG files
there worked a charm however when in panning mode I wanted to resize them to very small and I came across a limit there was not enough of working are in pan mode to make the logos appear really small...
what is the solution to this, anyone ?,
another example was making a small logo to appear on the bottom right corner I could not make it small enough to my satisfaction
so the watermark logo appeared a bit big in the final render....
Can someone elaborate on the above issues.
any help will be greatly appreciated.

thanks,
Drew