File Naming Convention

[TheMan]

I have a TV Series where each episode is named with SxxEyy where xx is the season number and yy is the episode number. Videostream does a great job understanding this and organizes episodes within seasons. (In the Android client.)

However, some episodes are 2-parters (to be continued!)..... I've got these episodes named like this: SxxEyyPzz where zz is the part number. Here are examples:

Married...WithChildren-S02E02P1-PoppysByTheTree.mp4
Married...WithChildren-S02E03P2-PoppysByTheTree.mp4

VideoStream doesn't understand this part 1/part 2 notation, and leaves these episodes out of the handy organization scheme.

What is the proper notation for annotating multi-part episodes?