or use FTP to transfer files bigger than 4GB to the internal HDD.
don't use wifi, it will be slow. to get faster FTP transfer rate, don't even go through your router, but connect both PC and PS3 in direct ethernet cable. but, you said "less cable the better" so wifi will be slow.
or use split4G to split the file, then use homebrew (or MultiMan) to automatically unsplit the files when copying to internal hdd, it will be faster.
or use NTFS to do the copy to internal and don't split it at all.