That's what I call bad news... (and I just had to find that out on Monday morning...).
But if I understand correct the file (sims06.package):
1) gets renamed into a random combination of letters and numbers
2) it's size will be about 6.8 MB
3) it contains several 100 CRES
4) it shows no type when opened with 'clean installer'
I now officially hate eaxis. (I now have over 10.000 files to check, thankfully I have 'clean installer' to help speed up the process...).