Ok, first off, a USb drive is not a memory stick. If you send someone into a computer store asking for a memory stick chances are they will walk out with a Sony Memory Stick and it won't be of much use for them, be careful re-using an existing term.

Second, what happens if the ER doesn't have any way or policy forbids installing any software. If I were in charge of IT for any hospitar or first response team I wouldn't let people plug in USB drives and install software, the risk is just too great.

Third what happens 3-4 years or even longer down the road the software is not supported how do you get your data back out? I was in that situation before, programs like TaxAct, Microsoft Money, Microsoft Publisher, etc. Old versions get discontinued and the new versio won't import the old data so you end up having to install the old version on an old os on a dedicated system.