diff --git a/gen-playlish.sh b/gen-playlist.sh
similarity index 59%
rename from gen-playlish.sh
rename to gen-playlist.sh
index fc83722..1b734f9 100755
--- a/gen-playlish.sh
+++ b/gen-playlist.sh
@@ -2,125 +2,97 @@
 
 rom_dir=$(echo "$1" | sed -e 's/\/$//')
 sys_type="$(basename "$rom_dir")"
+ROM_PREFIX=${ROM_PREFIX:-"/storage/roms"}
+CORE_PREFIX=${CORE_PREFIX:-"/tmp/cores"}
 
 case "$sys_type" in
   'nes')
     rom_ext="nes"
-    core_path="/tmp/cores/fceumm_libretro.so"
+    core_path="$CORE_PREFIX/fceumm_libretro.so"
     core_name="Nintendo - NES / Famicom (FCEUmm)"
     db_name="Nintendo - Nintendo Entertainment System.lpl"
     ;;
   'atari2600')
     rom_ext="a26"
-    if [ -n "$GPI_CASE" ]; then
-      core_path="/tmp/cores/stella2014_libretro.so"
-      core_name="Atari - 2600 (Stella 2014)"
-    else
-      core_path="/tmp/cores/stella_libretro.so"
-      core_name="Atari - 2600 (Stella)"
-    fi
+    core_path="$CORE_PREFIX/stella_libretro.so"
+    core_name="Atari - 2600 (Stella)"
     db_name="Atari - 2600.lpl"
     ;;
   'atarilynx')
     rom_ext="lnx"
-    core_path="/tmp/cores/handy_libretro.so"
+    core_path="$CORE_PREFIX/handy_libretro.so"
     core_name="Atari - Lynx (Handy)"
     db_name="Atari - Lynx.lpl"
     ;;
   'arcade')
     rom_ext="zip"
-    core_path="/tmp/cores/mame2003_plus_libretro.so"
+    core_path="$CORE_PREFIX/mame2003_plus_libretro.so"
     core_name="Arcade (MAME 2003-Plus)"
     db_name="MAME 2003-Plus.lpl"
     ;;
   'pcengine')
     rom_ext="pce"
-    core_path="/tmp/cores/mednafen_supergrafx_libretro.so"
+    core_path="$CORE_PREFIX/mednafen_supergrafx_libretro.so"
     core_name="NEC - PC Engine SuperGrafx (Beetle SuperGrafx)"
     db_name="NEC - PC Engine - TurboGrafx 16.lpl"
     ;;
   'gba')
     rom_ext="gba"
-    if [ -n "$GPI_CASE" ]; then
-      core_path="/tmp/cores/gpsp_libretro.so"
-      core_name="Nintendo - Game Boy Advance (gpSP)"
-    else
-      core_path="/tmp/cores/mgba_libretro.so"
-      core_name="Nintendo - Game Boy Advance (mGBA)"
-    fi
+    core_path="$CORE_PREFIX/mgba_libretro.so"
+    core_name="Nintendo - Game Boy Advance (mGBA)"
     db_name="Nintendo - Game Boy Advance.lpl"
     ;;
   'gbc')
     rom_ext="gbc"
-    core_path="/tmp/cores/gambatte_libretro.so"
+    core_path="$CORE_PREFIX/gambatte_libretro.so"
     core_name="Nintendo - Game Boy / Color (Gambatte)"
     db_name="Nintendo - Game Boy Color.lpl"
     ;;
   'gb')
     rom_ext="gb"
-    core_path="/tmp/cores/gambatte_libretro.so"
+    core_path="$CORE_PREFIX/gambatte_libretro.so"
     core_name="Nintendo - Game Boy / Color (Gambatte)"
     db_name="Nintendo - Game Boy.lpl"
     ;;
   'n64')
     rom_ext="z64"
-    core_path="/tmp/cores/mupen64plus_next_libretro.so"
+    core_path="$CORE_PREFIX/mupen64plus_next_libretro.so"
     core_name="Nintendo - Nintendo 64 (Mupen64Plus-Next)"
     db_name="Nintendo - Nintendo 64.lpl"
     ;;
   'snes')
     rom_ext="sfc"
-    if [ -n "$GPI_CASE" ]; then
-      core_path="/tmp/cores/snes9x2002_libretro.so"
-      core_name="Nintendo - SNES / SFC (Snes9x 2002)"
-    else
-      core_path="/tmp/cores/snes9x_libretro.so"
-      core_name="Nintendo - SNES / SFC (Snes9x - Current)"
-    fi
+    core_path="$CORE_PREFIX/snes9x_libretro.so"
+    core_name="Nintendo - SNES / SFC (Snes9x - Current)"
     db_name="Nintendo - Super Nintendo Entertainment System.lpl"
     ;;
   'ngpc')
     rom_ext="ngc"
-    core_path="/tmp/cores/mednafen_ngp_libretro.so"
+    core_path="$CORE_PREFIX/mednafen_ngp_libretro.so"
     core_name="SNK - Neo Geo Pocket / Color (Beetle NeoPop)"
     db_name="SNK - Neo Geo Pocket Color.lpl"
     ;;
   'gamegear')
     rom_ext="gg"
-    if [ -n "$GPI_CASE" ]; then
-      core_path="/tmp/cores/gearsystem_libretro.so"
-      core_name="Sega - MS/GG/SG-1000 (Gearsystem)"
-    else
-      core_path="/tmp/cores/genesis_plus_gx_libretro.so"
-      core_name="Sega - MS/GG/MD/CD (Genesis Plus GX)"
-    fi
+    core_path="$CORE_PREFIX/genesis_plus_gx_libretro.so"
+    core_name="Sega - MS/GG/MD/CD (Genesis Plus GX)"
     db_name="Sega - Game Gear.lpl"
     ;;
   'mastersystem')
     rom_ext="sms"
-    if [ -n "$GPI_CASE" ]; then
-      core_path="/tmp/cores/picodrive_libretro.so"
-      core_name="Sega - MS/MD/CD/32X (PicoDrive)"
-    else
-      core_path="/tmp/cores/genesis_plus_gx_libretro.so"
-      core_name="Sega - MS/GG/MD/CD (Genesis Plus GX)"
-    fi
+    core_path="$CORE_PREFIX/genesis_plus_gx_libretro.so"
+    core_name="Sega - MS/GG/MD/CD (Genesis Plus GX)"
     db_name="Sega - Master System - Mark III.lpl"
     ;;
   'megadrive')
     rom_ext="md"
-    if [ -n "$GPI_CASE" ]; then
-      core_path="/tmp/cores/picodrive_libretro.so"
-      core_name="Sega - MS/MD/CD/32X (PicoDrive)"
-    else
-      core_path="/tmp/cores/genesis_plus_gx_libretro.so"
-      core_name="Sega - MS/GG/MD/CD (Genesis Plus GX)"
-    fi
+    core_path="$CORE_PREFIX/genesis_plus_gx_libretro.so"
+    core_name="Sega - MS/GG/MD/CD (Genesis Plus GX)"
     db_name="Sega - Mega Drive - Genesis.lpl"
     ;;
   'psx')
     rom_ext="cue"
-    core_path="/tmp/cores/pcsx_rearmed_libretro.so"
+    core_path="$CORE_PREFIX/pcsx_rearmed_libretro.so"
     core_name="Sony - PlayStation (PCSX ReARMed)"
     db_name="Sony - PlayStation.lpl"
     ;;
@@ -153,7 +125,7 @@ for rom in "$rom_dir"/*."$rom_ext"; do
   else
     rom_label="$(echo "$rom_file" | sed -e 's/\( ([^)]\+)\)*\.[^.]\+$//')"
   fi
-  rom_path="/storage/roms/$sys_type/$rom_file"
+  rom_path="$ROM_PREFIX/$sys_type/$rom_file"
   cat >> temp.json <<EOF
     $comma{
       "path": "$rom_path",