help with inverse telecine 1:5 pattern

[mpeterson]

Hi.  I have a video clip that has 1 progressive frame with no combing then 5 interlaced frames with combing in a repeating pattern of 1:5 which is a 6 frame pattern not the usual 5 frame 3:2 pattern.  i don't know how to properly inverse telecine it. I may be wrong about it being telecined but it looks to me to have 1 progressive frame and the doom9 ivtc guide said if it has one progressive it should be ivtced and decimated. any help on ivtc settings would be greatly appreciated.
180upload link:
http://180upload.com/i0rmes31qi6h interlace problem.mpg - 44.8 MB
background info
The clip is 30sec 45mb mpg ps i cut out using videoredo. its from a full episode I recorded from a NTSC broadcast at 29.970 fps   The show was originally on in PAL regions at 25 fps.