This may help a little bit .. quoted from the mIRC help file:
You can manually redirect an incoming dcc send to a specific folder with /dcc get <folder>. You can use /dcc reject to reject the dcc send. Both of these commands must be called from within the CTCP event or the on DCCSERVER send event. $filename returns name of file.The /dcc command takes quite a few parameters (such as get/reject/etc.) that you may want to look into.
