This works for CentOS 5.5 64bit:
Add this to /etc/yum.repos.d/CentOS-Base.repo
#ATrpms
[atrpms]
name= CentOS-$releasever - ATrpms
baseurl=http://dl.atrpms.net/el$releasever-$basearch/atrpms/testing
gpgcheck=1
gpgkey=http://ATrpms.net/RPM-GPG-KEY.atrpms
enabled=1
rpm --import http://packages.atrpms.net/RPM-GPG-KEY.atrpms
yum install subversion qt47-devel qt47-webkit gcc-c++
svn co https://cutycapt.svn.sourceforge.net/svnroot/cutycapt
cd cutycapt/CutyCapt
qmake
make