Dear all, I am wondering what the best way is to merge two zTools. I have searched this forum but it seems the answers are not quite clear. Anyone knows where I can find a good tutorial for this? Thanks!!!
well, you could use the Tool > Geometry > InsertMesh button, or if the two tools are subtools, then you could use the Subtool Master > Merge, but remember that the two tools need to have the same number of subdivs. Once they’ve been merged, you can then rebuild the subdivs with the ‘Reconstruct Subdiv’ button, and then correct the frame with the ‘Reproject Higher Subdiv’ button.
http://www.zbrushcentral.com/zbc/showthread.php?t=57154 <–subtool Master
if you simply want to merge the tools into one tool use this plugin.
if you mean you want to combine a mesh into another mesh and have it be like one continuous mesh, you use the clay brush to blend the two surfaces together. Then you make a resurfaced object and project to it.
Thank you both!! I will check it out! 
Cheers!