Merging tracks

[onomou]

First off, thank you for the great program. It is becoming an indispensable tool for me.

Is there any way to merge two or more tracks inside a .gpx file? I figured out how to merge two actual files but can't find an option to do it internally. I have my GPSr (Garmin 60csx) set to record track information in .gpx format at specified time intervals with one file per day, and when it thinks I've stopped for too long or it loses signal it creates a new track inside the file. I can merge the tracks in MapSource, but I am hoping it is possible in RouteConverter (I like its interface a whole lot more than MapSource) to do the same thing. Is that option available currently?

Thanks for your help
-Steven