[SOLVED] About Realtor

Hi Friends,

Im very insterested in buying Realtoy full package(page design + extensions), and have some questions:

1) is compatible with joomla 1.5.14?
2) if i get errors when installing you could help me?
3) Now i want to install in a single domain, but im not shure that is the final domain, can i change it after??
4) is a single download? or U have a list of downloads?
5) Finally, wtih a silver memership + a copyright removal (45+35) is the cost?
6) The site can support a very intensive use, for a national portal ?

Thanks!!!!!