you have to umount it after copying the stuff over.As for the grub config: https://wiki.archlinux.org/index.php/GR … figuration
The ArchLinux Wiki has the best documentation available and with the problems you describe here, if it does not suffice, ArchLinux is likely not for you.Everyone can install ArchLinux and most can use it, but it does require more from the user than Ubuntu and such.https://wiki.archlinux.org/index.php/The_Arch_Wayhttps://wiki.archlinux.org/index.php/Beginners%27_Guide
Of course you can edit the grub.cfg manually. But you're probably looking for this: https://wiki.archlinux.org/index.php/GR … ious_entryPS: If you miss GRUB Legacy, Syslinux is very similar: https://wiki.archlinux.org/index.php/Be … bootloaderAnd don't forget to mark it as solved.
Network and Xorg issues sounds to me like you did too much in one go.https://wiki.archlinux.org/index.php/Be … leshootingCheck the connection, check the driver status and load the module: https://wiki.archlinux.org/index.php/Ne … figurationIf the network interface doesn't show up (eth0), read this part: https://wiki.archlinux.org/index.php/Ne … Interfaces
Start by installing the appropriate video drivers.https://wiki.archlinux.org/index.php/Intelhttps://wiki.archlinux.org/index.php/AtiAlso see: https://wiki.archlinux.org/index.php/hy … e_GraphicsI have searced and found in some forum posts that AMD catalyst is not compatible with xorg-1.15.Therefor I'd try the open source one first, see link above.