yes, but it could be pretty tricky,
do you need the face to be talking or changing expressions?
if not you could use a picture of your face with a transparent background (compile this in an image app first), then use the clip>motion option to key-frame the necesary movement in Premiere (I'm using Prem'6).
if you've got to have the face talking/changing expressions then:
you could construct some sort of green-screen-smock(TM) set-up, so you've got your face poking through against a green background, then use the transparency settings to key it out and superimpose it onto the other clip, adding movement if necessary.
or you could use a track matte, created in an image app, which cuts out the bit around your face, then sit still and record the talking etc. then use the track matte (as described in this thread and the prem help file) and add the motion like earlier.
These are just suggestions, Might help you get started, someone else may well have a simpler solution for you soon.
Panasonic SD9, Panasonic NVGS-75, Canon MV600i