Photoshop CS4 Setup Error

Hi,

I am relatively new to the whole MAC malarky... so I think my username really says it all. I did something moronic. I asked a friend how to delete an application -- I went ahead and deleted the whole Adobe Photoshop CS4 folder. I went back and even covered all my idiot-bases and deleted a lot of everything that was related to photoshop cs4 files.

I then tried to re-install CS4 and I got an error which said;

"Setup has encountered an error and cannot continue. Contact Adobe Customer Support for assistance."

I googled this for hours and downloaded the adobe cs4 clean up tool from the adobe website. I then tried the uninstall and got this error:

The installer database is invalid: please re-install the product from the original media. Please see the Setup log file for details.

But of course I cannot install the original media set up. And then, I do a search for anything relating to a photoshop set up anywhere on the harddrive....

And then following some... clearly ill advice... I deleted a folder renamed "resources"...ahem...

And now this error occurs when I run the cleanup / uninstaller that I downloaded from the adobe site.

"Startup Error: required sources are missing"

Yes I am aware that this post is the kind that would generally make someone like me say, "how the hell did you ever manage to legally get your hands on a computer?!?!" but I assure you, I am generally not this stupid...

Can someone help me? I actually need photoshop for my work and studies and have an assignment due in a few days that I can't finish without it :/ ... Any help would be so greatly appreciated.

Kind regards,
Jess