metamorph generated multiple tif rendered via Image J

[giuliabolasco]

Dear all,
I have done a 4D acquisition (xyzt) using a Leica Spinning disk which is interfaced with Metamorph software. now I have multiple tiff images (each tif contains 70 z stacks) repeated for all the timepoints I have done. When I try to import them into ImageJ they appear as series of z in time...Ideally I would like to make a z MIP in time. Is there any macro that I can use for that instead of going tif by tif which can be really tedious as there are 200 timepoints??
Thanks
best
giulia