Hey Mano,
don't think you can actually 'record' them, what you do with VSTi's is use the 'export audio mixdown' command (File menu). This writes to disk a mixdown of all unmuted internal audio sources (wav files on audio tracks and VSTi's) between locators. In the dialog that appears you can specify filename, mono or stereo output, resolution/sample rate, whether effects should be included, and whether an audio track should be created in the current project with the new file on it. If the effects include delays or reverb, make sure to set the right locator a bit further to include the full effect, mute all sources you don't want to include, and check if there's no clipping in the mixer.