changing lighting fixtures in Hog2 Showfile

O.K.
I've searched the forums for this and so far drawn a blank.

Is it possible to change lighting fixtures in a Hog2 showfile?

For example, Show is programmed with mac2K's and then these fixtures are physically changed to VL3000's at a later date.
Is it possible to simply change the fixture type in the Hog (with a little tweaking magic) and "hey presto" all the lighting Cue's are pretty much as they should be?
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