The alternatives are:
1- Use a file manager like IRISMAN, ManaGunz or Simple File Manager to copy from ntfs to /dev_hdd0
2- Use webMAN MOD full edition to copy the ntfs files in background while you do other things
3- Use FTP server to transfer the file from PC to PS3. PS3 has many ftp servers available to choose.
4- Use ps3netsrv to mount the folder containing the ISOs as a data disc then copy the files from /dev_bdvd.
5- Mount the ISO as /dev_bdvd, then dump the game using IRISMAN, multiMAN or ManaGunZ.
6- Use the games directly from NTFS. Use prepISO to scan the content and mount it with webMAN MOD.
7- Use the games directly from PC. Mount them through ps3netsrv.