P4 w/Pro Pack and P5 are both slow loaders on my Pentium 4 system, but other applications load quickly. I think that's just the nature of Poser, it's like when you open a complex Daz figure and it seems to take forever. The Python Script thing sounds weird and I don't think it should happen (it doesn't do it on my PC). If I were you I'd contact technical support at Curious Labs, there may be something else going on there. I read in the CL newsletter last night that Service Release Pack 3 will be coming out at the end of the month. Hopefully it will address a lot of our P5 problems.