Problems saving Emulator/Rom's to Xbox through FTP...

I have Multiple Iso disks with Emulators / Rom's for 64 Mame Neogeo kawa x Atari Snes nes.. They play fine through my disk drive. I have loads of free room on My Hard drive. I know I can just use copy disc feature, but I want to select what Emulators and Rom's I install. I'm using Unleashed X. Under the emulator file selection, anything I copy will not show aside from file exploration, as well as under Rom selection. I also want to install XBMC but I have no idea where to drop it or what file extensions to use. Basically I was only able to download Skins off of a site as a bundle. I dropped it in the skins selection. BTW I have a skin folder and a skins folder. skin folder redirects me to skins folder. When I apply a skin it says press A then press start Ax2 . My skins will not stay on after reboot it goes directly to default. Any help with these bugs , and Emulator /Rom problem's?