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Can I run two networks in the same place

Guys, A hotel need a plasma display showing content from a pc but they don't wont us to run cables from a pc which is the best way of course, So we are thinking of using a OTC Wireless Data 802.11g adapter to send content playing on pc which will be Flash files of different animations to the plasma, anybody ever done this?, and will it play smothly

But also the Hotel already has a Wireless network for the guests laptops Can we run two together?, We cant change the current AP so any changes have to be done to our setup

Would it be better to run the plasma and pc in adhoc mode or as a 2nd AP? This will be playing 24hrs so I need to make sure these two networks are not going to crash each other,

Any advice would be very good

Thanks Oliver