please have a look at my last post down here if you want to compile Mozilla using the free Microsoft Visual C++ Toolkit. If you have e.g. mingw (free, too, isn't it?) it's a bit easier. Anyway, please have a look here.
Can you give me detailed instructions on everything.
That would require a "bit" much of a text and time, sorry. Please follow and read the links I posted. If you want to use MinGW just search the MozillaZine forum that's linked for a tutorial if the steps on the Mozilla homepage shouldn't be clear enough. :-) But everything's there and if you have problems you'll soon find others (Google) that had these before, too and solved them. :-)