  Based on additional interferometric observations, we reanalysed the CO(2-1)
and 3mm continuum emission of Q0957+561, a lensed QSO at a redshift of
z=1.4141. The emission in the CO(2-1) lines reveals a gas-rich host galaxy with
a peculiar double-peaked profile at one of the two lensed images. Our new
interferometric CO maps of the host galaxy agree well with HST images obtained
by Keeton et al. (2000) and we thus argue that the two velocity components
arise from molecular gas in the disk of the host galaxy. We also present new
model calculations, all in excellent agreement with recent time delay
measurements and simulations.
