A V9 Navcore won't really help you on a 32mb device unless you try the new 9.410 for One models which has support for LoquendoTTS and the Asian iFlytech TTS system.
But still it is designed for 64mb devices!
The only real solution to get enough free Ram is using a V8 Navcore or a V9 designed for 32mb devices.
The 9.205 would be a choice if the correct SE is used.
If you don't want to search for working Navcore links and SE versions try the DSA tool