I've done that on my site. For example, in my browse.ini.append.php, I have :
[BrowseSettings]
AliasList[]
AliasList[tags]=60
AliasList[galeries]=124
# Action for selecting a node placement for an object.
[AddNodeAssignment]
StartNode=tags
SelectionType=multiple
ReturnType=NodeID
StartNode_class[24]=galeries
This tells to eZ Publish that when I want to add a location the default start node is "tags" which node id is 60. For class which identifier is 24, the default start node is "galeries" which node id is 124. You can do the same for every type of browse.
