Hi
Normally you won't need to drag the sequence to the right. If you want to add some more clips to the start of your timeline, you can drag and drop them directly from the media list window.
Pull them with the cursor from the media list down to the timeline where a yellow box will appear. Drag the clip (plus the box) to the left and it will be attracted to any of the clip joins where you can release it. Drag it to the extreme left and it will be added to the start of the timeline. Clips already on the timeline witll be moved to the right to accomodate the new clip. I think this is what you require.
As an alternative you can open the Options screen (Click the chevrons at the RH end of the toolbar.)
Under the "Options" "Media" tab change the "Add new clip to the following position" to "Ask Me" followed by OK.
If you now right click any clip on the media list and select "Place on sequence" you will be prompted for a position. eg. "Place on sequence at start"
In the latest version of VP you can set the cursor automatically at any join and then use "Place on sequence at the cursor."
Nat