Ripple Edit is probably the easiest.
Make sure you select the bottom (All tracks, markers etc) from the drop down on the Ripple edit button.
Drag one of the events right.
Turn Ripple Edit OFF.
Insert your new media.
Turn Ripple edit ON again and drag those that are to the right of your inserted media back again.
Turn Ripple Edit off.
Alternatively, use a script which in one click will allow you to select all the events to the right of the cursor, before dragging Excalibur and Ultimate S both have this facility - and thre may even be some free ones out there.