Fed up of running out of Reagents? Especially Mandrake Root. Here's a little trick I found by accident...

Place the scroll and reagents onto the binding pentogram. Then select the flame spell (Level 0 spell), release the cursor (The Q key) and click on the pentogram to light the candles. When the box asking you to type in the chant for the spell, use the mouse to drag the reagents off the pentogram and into your backpack. Then type in the chant and watch it take the scroll away with no reagents, and bind it to your spellbook.

I am not sure, but you may be able to take the scroll aswell.