How about if you simply EDITED your DivX movie so to cut the commercials out?!
This can be done in less than 5 minutes using the program
VirtualDub
Guides for using it can be found
here.
Nevertheless I agree it would be cool to be able to skip a predefined time value forward with BSPlayer. Cool, but not urgent.
Finally for the deinterlace filter, it's again the same: you should EDIT your movie and FIX it instead of needing to use a filter every time... after all, that's one of the biggest advantages of having video recorded digitally!
Cheers, Smarties :P