Newbie Problems

HELP!!

OK I think I really screwed something up now.

I was having problems opening up an .eps file in my photoshop 4.0 LE so I installed photoshop 7.0
(I sent the eps file to a friend and he said he had no problem opening the file in PS7)
I continued to have a problem as a message stating something about "Rasterize"? continued to pop-up. I read this had something to do with layering...

I surmised the problem might be that I had both versions of photoshoop installed on my computer and that the 4.0 LE edition might be interfering with the PS7 edition.
I transferred the 4.0 LE to an external hardrive

After I transferred the file I completely removed the
program from my 'Program' file. (I think I removed
something in Adobe that I needed.)

NOW THERE IS SOMETHING MISSING ON MY COMPUTER..

1) When I try to open the logo (.eps file) there is no
longer a 'Run' option, now it says 'Find'
When I click this menu it takes me to an Adobe website
and prompts me to purchase photoshop.

2) When I try to open Photoshop 7.0 on my computer a
menu comes up stating "could not complete your request
because of missing or invalid personalization
information" ???

3) When I try to re-install photoshop 4.0 LE I
continue to get a message stating "the item that this
shortcut refers to has been changed or moved, so this
shortcut will no longer work properly."

I'm stuck!

Cut