i know on the FX 1.3.9 that had to use either a hosts file, or the 3rd party patch,
but on the FX 1.3.10betta 11 there was an option to add the peer cache ip's direct into your config (this dont work on the fx 1.3.10betta 13 as that was cache fixed by eagle.
if using the fx 1.3.10 betta 11, this should work in config, (i took the ip's from the hosts file that was on previous post)
/setWpnOption UsePeerCacheList=1 << make sure that is set to 1
you can have upto 10 cache ip's in the config, it will only read 10 maximum, and you can set your wpn to 2-6 depends how much bandwidth you want to use