[CentOS] IMP 4

Dear All,

anyone installed IMP4 on Centos 4.1 yet, http://www.horde.org/imp/4.0/

if so what problems did you have,  I have a webmail server I am going to 
upgrade to Centos 4.1 and Imp 4 from its current centos 3.3 
implementation and imp3

This is going to be a labour intensive manual task, and I wondered if 
anyone else out there was mad enough to have tried it already....

Failing that just advice on IMP4 installation on Centos 4.1 will be fine :-)

P.