There is a file named "script" in the "misc" directory on disk 2 of Gloom. Use an XPK decruncher or Crunchmania to decompress this file. Now load the file into a text editor and you will be able to edit the script to start at any level. Now save the script and recrunch it with Crunchmania or an XPK packer that supports Crunchmania (e.g. XFDcruncher/decruncher, which is available on Aminet).