I'm a newbie so please excuse my ignorance...

I just signed up for the Zen-Fire demo (I plan on using them when I start trading live etc). I have some general questions about how NT works in conjunction w/ the ZF data feed.
1) I turned off the 'Store real-time bar data' option after reading in the forums that this will help w/ performance. I'm assuming this is because ZF will update the data when requested, is this correct?
2) How do I retrieve all the historical data (for ES) for back-testing? I've tried using the ES 06-09 contract and setting the Range Settings to start on 1998 but it seems to crash NT. If I try to use an older contract is generates an error - something about the NT feed not supported. My goal is to load all the historical tick data for proper testing (maybe going back to '98 is over-kill but though I would try).
Big thanks!
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