[PyQt] Is the download of sip and pyqt4 the same for 2.7 and 3.2?

[Vayu]

Is the download of sip and pyqt4 the same for 2.7 and 3.2? 

The following is more of an install issue, I hope it's not inappropriate to ask here.

I downloaded the latest version of sip/pyqt4 and the message from .configure indicated it was going to put some stuff in /usr/bin (and some in a python3.2 directory). 

I already have 2.7 installed from my package manager (Ubuntu 11.04) and am thinking that my existing install for 2.7 must have stuff in /usr/bin and might break.

Should I unistall everything sip and pyqt4 related and then run configure.py/make/make install separately for both 2.7 and then 3.2?  Or can I go ahead and leave 2.7 as is and just manually install for 3.2? (my package manager had python 3.2 but not sip and pyqt4 for it.)