level data

[Crazyjoe5150]

I expaned the rom but i need to know where to repoint the level data to use free space instead so i can make the cloned rooms as big as i want i need level id numbers please

[Mar99troid]

It's been a while since I last hacked Super Metroid, but any free space in the same bank should be fine (where you see a bunch of FF's in Hex Editor).
If it's just the level data, then choose the offset 273300, which should be free in unedited roms. Should it be occupied by something else then just scroll down until you find a bunch of FF's to post your data. You also have to edit level_entries.txt so SMILE shows you the right value of free blocks. Then change the pointer for your level data to CEB300, which is 273300 converted to LoROM. If you chose another offset, you'll have to use a LoROM converter (Smile RF has an integrated one I think, not sure though). You can also overwrite data of unused rooms if you want to.
But also remember that you need the repoint all the other stuff, to have as many enemies / items / etc. as you want. For reference look up "Super Metroid Mod Manual".