IMHO, detail-stripping a CZ pattern gun just for cleaning isn't a very good idea. Unless there's some serious dust, gravel, sand, whatever in there, stuff that might cause significant extra wear or damage, I'd just spray the inside out with Breakfree or somesuch.
However, if you're committed, you can get it pretty well apart without having to remove any roll pins.
First, field-strip the pistol (after showing clear, of course!).
Next, unscrew the grips.
Next, push out the pin holding the top of the mag brake (long leaf-spring thingy). It's not under much tension, so it should be easy.
Next, you'll have to punch out the pin that holds the mainspring plug in place (it also goes through the bottom of the mag brake). This one is under much more tension, and will be the major challenge during reassembly.
The force of the mainspring should eject(!) the plug, you can then remove the mainspring itself.
Now, look down from the top of the frame. Look inside the ejector block/sear housing, you should see the sear spring. One "arm" of the sear spring rides in a little groove, which retains the safety lever. Lift this arm out of its groove, you should then be able to remove the safey lever, and then the ejector block.
Going any further requires removing roll pins, mainly the ones retaining the trigger and hammer.
(note that this is based on my experience with my Baby Eagle, and my not perfectly match "real" CZs)
