Hey all!

I was wondering how do the level codes of Oh no! More Lemmings are generated. I remember a post where a guy found the level code for the non-existing level passed Mayhem 30 in the original Lemmings game so that you could get weird level ratings. Here, I'd like to do the same trick, but for ONML. Can you please help me?
Thanks!
Herman Perk managed to find out how the codes to Lemmings and ONML are generated, and documented it.
Below is the original archive:
pro-EFL-tip: you don't insert "do" on a question with "to be". Sorry, I can't resist correcting.
Thanks geoo!
Finlay: Oh yeah, you're right. Thehe... It's fixed now.
This looks like the sort of thing that would be
relevant to my interests. 
I had a quick read through the file geoo posted, and I'm not sure how that helps you generate codes for non-existent levels and weird ratings. Can someone please explain, or at least provide an example of such a code?
Excerpt of LCP0S0.TXT from geoo's attachment, listing only crash codes:
Lemmings + demo (4+124); COVOX (8+1); Bonus (16+1); Xmas91 (4+1); Xmas92 (4+1)
FAJHMFIJJS
IJHMFIFKJL
NHMFIFALJY
HMFIFINMJR
MFIFAJLNJK
FIFIJLMOJT
IFANLMFPJQ
FINLMFIQJJ
Oh-no! more Lemmings; Oh-no! demo (5 levels + 1 crash code)
TDIFAHTFGE
1993 Holiday Lemmings + demo (4 levels + 1 crash code)
BAJHLDIBCG
1994 Holiday Lemmings + demo (4 levels + 1 crash code)
FAJPLDHBGF
Original Lemmings demo, old version (4 levels + 28 crash codes)
Level Fun etc. Crash code Crash code Crash code Crash code
1: DGHPVMXHIY DOLTVMXOIP XDGLTWMVIP OXDOHTVMJM WOXDGHTTJM
2: OHPVMXDIIR DGHPWMXPIR DOLTWMXWIY XDGLTVONJJ OXDOHTWUJV
3: LPVMXDGJIO OHPWMXDQIK DGHPVOXHJL DOLTVOXOJS XDGLTWOVJS
4: PVMXDOLKIX LPWMXDGRIX OHPVOXDIJU DGHPWOXPJU DOLTWOXWJL
5: VMXDGHTLIQ PWMXDOLSIQ LPVOXDGJJR OHPWOXDQJN
6: MXDOHTVMIJ WMXDGHTTIJ PVOXDOLKJK LPWOXDGRJK
7: XDGLTVMNIW MXDOHTWUIS VOXDGHTLJT PWOXDOLSJT
-- Simon