Avisynth help needed please.

OK I know how to manually IVTC video now(Thanks Moth3r)but I am seeing something else now I would like to do manually if it is possible,this is the start of my IVTC script:

DirectShowSource("C:\JSC SW 1-0001.avi")
Crop(12,58,-8,-152,align=true).DoubleWeave()  <I FORGOT TO ADD THIS TO THE END OF CROP
part1=Pulldown(2, 4).trim(0,-13224)
part2=Pulldown(1, 3).trim(13225,-39130)
part1+part2

Well the above crop is good until about half way through the avi file then it dramatically changes,so what I want to know is this,can I manually IVTC and manually crop at the same time,and if so how would this be added to the script?

this JSC set is going to be some work.

also 1 last question,once I have all the crop settings and IVTC settings how do I mash them altogether to get 1 avi file of the movie,or does this have to be done in chunks then put together?

I am at a stand still now until I can figure this out.

Thanks in advance for the help

OK forget the cropping,I found a happy medium,but when I combine the parts my darn framerate changes from 23.976 by 1\2 to 11.988,why would this be happening?

nevermind LOL,neuron2 gave me the answer at Doom9,jeez I feel stupid,I knew the answer,I have it in my notes LOL,I must be losing my darn mind.