I've swapped the wheels on the white E39, which were E46 wheels for some reason (actually, just couldn't find an adequate mod), for my R33 GTR wheels. Thanks, Soju. I also got and put on some old flares, which are exactly the same as the ones on the Civic.
Told you it looked like the Civic's flares.
The non-running E39, I think, will get an engine swap at some point, since it's plagued with problems, and I'm pretty sure it's completely ruined. It was on weird blacked out rims.