Yamaha DTXpress/DTXplorer/DTXtreme

At the moment I'm using a PM-16 to add additonal pads to my setup.  
Obviously this means I have some pads connected to my module and 
some pads connected to my PM-16 all mixed up around the kit.  If I 
remember correctly there is nothing that can be done for cross talk 
or double triggers when using two different sources for triggers 
right?  Here is my problem: When I hit my second tom (which is 
connected to my module) I get a slight and quiet sound from my crash 
cymbal (which is connected to my PM-16.)  I can't recall, but theres 
hardly anything you can do for this besides get seperate arms or 
seperate the pads right?  And just for good measure, let me go over 
some definations.

Double Triggers occur when one pad is hit but another pad makes a 
sound as well correct?  Which would be my current problem with two 
different trigger sources.  

Cross Talk occurs when you hit your hi-hat and snare and the hi-hat 
doesn't make a sound right?

Thanks for the lesson,

-UN.H