RRC filtering and interpolation

Hi,

I'm trying to understand some Rake receiver structures for WCDMA and I'm
having trouble with the interpolation stuff. Assuming down conversion to
base band has been done, I think one possible way of doing a Rake is to: 

1. sample at twice chip rate
2. RRC filter
3. Interpolate
4. Do timing adjust corresponding to tap delay
5. Decimate to chip rate
6. De-spread

Steps 4 through 6 would be done for each Rake finger. My question is if
one could do the RRC filtering and interpolation in one step, as in one
single filter? Normally there's a low-pass filter after an interpolator
and I thought the RRC filter could replace this low-pass filter. I this
correct?

Thanks in advance,

   /Fred