Do you mean Ulead Video Studio?
If so then ULead default to snapping clips together. I suspect that they do this on their budget package to prevent users from having gaps between clips.
Of course if you do want gaps between clips then simply insert a solid colour image (EG Black). You can, of course swap/move clips aroung the timeline (and Storyboiard view) quite freely, but only within the overall project duration, and clips will always snap together.
If you meant Ulead Mediastudio then you can place clips wherever you want.
Hope that helps.
COMPAQ something or other with 500Gb Boot Disk, 1Tb external Firewire Disk, 4Gb Memory and a super duper sound card, 19" TFT Monitor etc etc etc
Sony TRV33e : Sony TRV310e : Canon XM2
Sony Vegas Studio editions to v11
Remember, there is always more to learn than there is to teach.