You can find the latest version of the Decomb package at neuron2.net. I'd advice you not to deinterlace because that way you retain motion fluidity. If you must deinterlace, then the best way available right now is:

[code]For TFF Clips:
Interp = SeparateFields().SelectEven().EEDI2(field=1)
TDeint(order=1,field=1,edeint=Interp)

For BFF Clips:
Interp = SeparateFields().SelectEven().EEDI2(field=0)
TDeint(order=0,field=0,edeint=Interp)[/code]

You need TDeint and EEDI2, which you can find at the Doom9 forums.