Hi Arty,
In case you indeed finish the game, are looking for a "new" one afterwards, and should you decide to pick up Lemmings World Tour again, I just wanted to let you know that it's now available in both Old and New Formats ;) .
In general, I'd always advertise the Old-Formats version, because it includes the levels as intended, but in your case, I think you're already past all the major noteworthy radiation- and slowfreeze levels (like "Ayo Technology", "Japan", and "Only time"). After a quick look, there should only be a single one remaining on the Legend rank ("Blowing in the wind"), and two on the Groupie rank ("All you zombies" and "Hiroshima"). Meanwhile, the New-Formats version doesn't crash due to graphic-set mixing, which is a huge mark in its favour, considering overall game stability.
So maybe, whenever you decide to continue LWT, it's best to do so in New Formats, and then only switch back to Old Formats for these three select levels? ;) Or playing them in New Formats first, just like any other level, and then showing the Old-Formats version for comparision.
Of course, continuing in the Old-Formats version would also be perfectly fine, since I'll continue to maintain both versions; any backroute fixes will be done in Old Formats first, and the level will then be re-converted to New Formats by opening it in the new editor. ;) And you actually haven't had nearly as many graphic-set-based crashes as I would have expected, so the Old-Formats version still seems to be quite stable on your computer as well.
Just to clarify, I'm not in any way saying that this is what you should do next! :P :8:()[: I just wanted you and your audience to be informed about these things, for whenever you feel like proceeding with the pack. :laugh:
Since this information might also be interesting to other players and viewers, I'm putting it here publically (in the spoiler above), rather than just informing you via PM ;) . I remember you contemplating a while ago whether you would prefer to do the rest of the pack in the context of a stream one day, or rather continue with the 5-levels-per-episode format.