@NiLuJe Thanks for the tip, KUAL works fine, but MRInstaller not. Trying to install a package such as Update_usbnet_0.19.N_install_pw2_kt2_kv.bin gives me this:
150306:125015 system: I mr_installer:eips_print_bottom_centered::Hush, little baby . . .
150306:125020 system: I mr_installer:eips_print_bottom_centered::Launching the MR installer . . .
150306:125026 system: I mr_installer:eips_print_bottom_centered::Checking python 0.12.N I PW2
150306:125026 system: I mr_installer:eips_print_bottom_centered::Not targeting your device, skipping
150306:125026 system: I mr_installer:eips_print_bottom_centered:

estroyin g package . . .
150306:125026 system: I mr_installer:make_rootfs_ro::trying to remount rootfs ro
150306:125026 system: W mr_installer:make_rootfs_ro::rootfs is already ro!
150306:125029 system: I mr_installer:eips_print_bottom_centered:

one, restarting UI . . .