PF should be left on the SSD IMHO.
Technically speaking, you are better off to let Windows mange the PF size.
However, with smaller SSDs (I have a 40GB one myself) space can be a issue.
You may wish to try a smaller static PF.
In this case, I would suggest trying min and max both set at 2048MB and leave the PF on the SSD.
Im assuming youve already moved Documents, Pictures,Music, & Videos to the Spinning Drive?
If space is really that tight, you could put it on the spinner, and leave a small 400mb one the SSD, but I wouldnt reccomend it.