Auto Beat Correction BS

So I'm working on this song, it changes from 232 to 238 BPM and back again, twice in the song. Not a very complex task I'm sure. I have an audio clip inserted into the song, that changes like that because it was recorded like that. but FL Studio won't let me automate the beat of the song without it retardedly resampling what is already the correct tempo. So I figure "okay I'll just make up a beat in another project all together, export that as a wav file, then add that beat in on top of the song" But no... as soon as I put that WAV file into FL Studio, it resamples the damn 232 drum beat to make it 238 like the rest of the song...

This is irritating the crap out of me, I'm sure it's something that could be easily done, but why do all of the auto features tend to crap all over my Projects? and why can't I disable such a (Need to be optional) feature?

Anyway, if anybody could please offer me a suggestion as to how to go about this, I would appreciate it greatly. Thanks