I want to compile my Panda3D with the FFTW library; are there any tips on how to do that? What’s the reccomended compiler to use (on win32)?

Thanks in advance.

You need to get MSVC7, a.k.a. Microsoft Visual Studio .NET.

Carefully follow the step-by-step instructions in the INSTALL document in the root of the source tarball, or in the doc directory in the CVS tree.