converting current rc4 install to widefs fsx on new pc

Need help converting current rc4 install on my pc to widefs another fsx install on new machine(server running vista).I am hoping i dont need to reinstall rc4 to point it to widefs fsx. For ASA weather generator, i just have to update registryI might need to use rc4 with fsx installation on client pc, so is it possible to switch between the two setups as needed. By that i mean 1 - rc4 runs with fsx on same pc (client pc running XP)2 - and i would also like to run rc4 on client pc but with fsx on server pc. server pc has no rc4 install, but will widefs.----------------------------------------1 - Is widefs free like fsuipc, or do i need to pay, where can i purchase if so.2 - Any performance benefits to running rc4 on seperate pc, apart from easier sound control, is it worth the effort. Cuase in vista you can adjust rc4 sound independently.