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Well it turns out that editing Stockyards is troublesome as well: Lifts and switches crash the game, doors cannot be closed and the trap door animation used is from scrabania/paramonia which looks out of place for this sort of level.
I've attached a screen shot of my current work in progress. This screen will be altered slightly for the finished level. Hopefully editing R2 will produce the desired results.
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STOCKYARDS IS NOT TROUBLESOME!
All you need for lifts and switches is to simply add the .BND files to the .LVL file. Yes for some reason doors cannot be closed. My solution for this was to remove the door and edit the cam (Take a look at E1P06C02 on Stockyards V3) If you want it so that the player has to open the door the only solution I can think of is to use a mine.