MS Access+pen-test

[wymerzp () sbu edu]

I was looking over a client's website when I discovered a classic (almost cliche) sql injection vulnerability (i.e. 
Username ' OR ''=' | Password ' OR ''='). I did more poking and prodding and discovered that they are using MS Access 
for a backend. I know you can't string queries together (i.e. Select user from tbl where blah = var; Select...). My 
question is then, is there any 'good way' to use sql injection against this database to drive home the severity of the 
lack of input validation? Currently, the best I got was access to non-sensitive information that one simply needed to 
supply an email for.
Thanks a lot,
Zach

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