u're wellcome.
I hope this will solve ur 1_st problem
http://www.deskshare.com/vem.aspx
This is video editor. And google says it's free, but honestly speaking i'm not sure.
Anyway, most IT companies pay money back within 30 days if their product doesn't suit costumer. Besides, u can try trial version. so i guess it's worth having look.
2) cann't u run those files to indentify which belongs to second video?
all u might need is vob file extension - player.
At least u can convert vob files to MP4 using
allok video and after run it.
hope all those will work