This kind of maneuver will require you to obtain some backing or support from your own management -- at the very least, from your immediate supervisor. The best way to handle this kind of thing is to ask for an informal meeting -- like inviting your boss to lunch or something similar (you pick up the tab) -- and laying things on the line with him or her. If you can get the support you need, you may be able to make a deal for an informal appointment (like an "acting supervisor" title rather than a promotion/raise situation) instead of a formal appointment. You will want to stress your long-term goals and objectives with this person so they understand what you're after in the short term and the long term. But without some help from the management side, you may have to settle for the experience without either the title or the pay.
This was first published in December 2002