Terminal rename and move - [not what you think]

[ntzrmtthihu777]

Greetings,

Ok, I bet you are thinking "this has been asked and answered, search the forums before you post n00b" but this is a unique situation with (I hope) a unique solution.

Some background: I used the terminal to download a large amount of .jpg files from www.wizards.com (available for private use) and ended up with (by design) files with names like this:

leaving.asp?url=%2Fdnd%2Fimages%2Fpsi_gallery%2FPs i_1.jpg
leaving.asp?url=%2Fdnd%2Fimages%2Fpsi_gallery%2FPs i_2.jpg
leaving.asp?url=%2Fdnd%2Fimages%2Fpsi_gallery%2FPs i_3.jpg
...and so on.

what I want to know, is it possible to rename these files en masse, and move them based on the resulting name, say:

leaving.asp?url=%2Fdnd%2Fimages%2Fpsi_gallery%2FPs i_1.jpg
leaving.asp?url=%2Fdnd%2Fimages%2Fpsi_gallery%2FPs i_2.jpg
leaving.asp?url=%2Fdnd%2Fimages%2Fpsi_gallery%2FPs i_3.jpg

into

/home/username/dnd/images/psi_gallery/Psi_1.jpg
/home/username/dnd/images/psi_gallery/Psi_2.jpg
/home/username/dnd/images/psi_gallery/Psi_3.jpg

Preferably in some manner that replaces "leaving.asp?url=" with "/home/username" and the remaining "%2F" with "/"

I have already attempted this with Gprename, and as useful as that is it does not do the trick here. If it is not possible I can make do with what I know, but I should really like to have this done properly and organized. Assume the directories are already made.

Any tips, tricks, and how-tos would be appreciated!