could you use the TRS 2006 seiral code to get TRS 2004 trains for example i buy TRS 2006 and thenin the website http://www.auran.com/TRS2004/default.htm i use the serial number and use it will still be able to downlaod TRS2004 trains i am really woundering if i could do this i would aprecciate a reply i really wanna buy TRS 2006 but the website has NYC trains only for TRS 2004 PLS i need help on what to buy
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