yes.. you need a dedicated server unless you have special modules in place to make sure that the special apache settings are not disturbed by other sites.
It is not extremelyt dificult but it does require some knowledge. It will usually take an experienced installer 1 hour to install the preinstaller and software.. most of the work goes into configuring your server correctly.. a server that has been misconfigured will surely make it so your software does not work..
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