PFS question, fighter + spell items

[shalandar]

This is a question for PFS rules....

As a fighter class, if I purchase a cracked Vibrant Purple Prism as well as a few scrolls of Expeditious Retreat, could I do this:

• loan the prism and a scroll to a spell caster in the group
  
• the spell caster uses the scroll and casts it into the prism
  
• the spell caster gives the prism back to me (the fighter)
  
• I (the fighter) can now use the prism to cast a personal range Expeditious Retreat (one time) on myself when I want

From what I can see, this is completely legal....Obviously I would have to purchase multiple scrolls (for each time I wanted this done) and find a spell caster in the group who can cast the spell (or UMD it).

But I can't see anything that would mark this as illegal. Is there a rule I'm missing? Thanks.

[blahpers]

Flagged for move to PFS forum.

RQ-wise, this works fine. Not sure about PFS.

[Ferious Thune]

Yes. That would work. You could also pay for Spellcasting services before the session to have an NPC do it.