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A quick search for .scr editing files came up with this freeware
http://www.webattack.com/download/dliconsucker.shtml
Described as follows: -
"Icon Sucker is a utility that allows you to extract, or "suck," icons out of the files on your hard drive. Many different file types on your computer contain one or even many icons that you can use. Icon Sucker makes it easy to open these files and "suck" the icons out of them. Icon Sucker supports ICO, CUR, ANI, ICL, EXE, DLL, OCX, DRV, BPL, CPL, SCR and VBX files. The program can read all icons from both 16-bit and 32-bit application and library files. This version can only save the icons as BMP or ICO files, not GIF. Icons can also be coipied to the clip board using a custom background color. Pro version available with GIF support and some additional features for $10. "
'never used it myself but I think you most probably need something like this (or the type of software that creates these files ) in order to get the images back out (?)
Hope it helps ....
RT