What are your install issues?
What is the error message text?
Can you supply a screen shot of the error?
What is your operating system?
What permissions do you have on the system?
Where do you have PicPick Portable installed to (path and media)?
Have you tried installing the local version of PicPick?
I have been using PicPick Portable on a regular basis for over a year across multiple machines, operating systems, networks and permission settings. Every issue I encountered has been resolved so what ever your problem is, if it is specific to the portable version, it can be fixed.