Apparently, 'raw' here isn't in the classical sense, which is about making image files made of uncompressed data, only the raw RGB bytes. Some camera can do these files, but I believe interpreting these files is dependent on the camera model.

If I understood correctly your message, your colleague made a raw disk image of the card (why?), ie. seeing the content of the card as one big file instead of the classical structure of directories and files.
Supposing it isn't for the fun of it... I suppose he lost the directory data: somehow, it is the kind of task some undelete utilities can do on hard disks.

I know some freewares able to recover deleted images out of a hard disk, I don't know if they are able to recover them from a disk image.

If you want to do that manually, you can load the image with loadBytes(), then iterate on the resulting (big!) array.

OK, I have loaded the array using loadBytes(), and I'm trying to process the array. 

2. //JPG PROGRAM
3. 
   
4. //value of string repeating
5. int a = 0; 
6. //loading the colossally large array 
7. byte CARD[]; 
8. 
   
9. //solving an initial jpg problem
10. byte d[]; 
11. 
    
12. void setup() {
13.   CARD  = loadBytes("card.raw");
14.   initSearch();
15.   initPhotosave(); 
16. }
17. //search method :D 
18. void initSearch() {
19. 
    
20.   //card searching 
21.   for(int i = 0; i < CARD.length; i++) {
22.     if(CARD[i] == byte(0xff) ) {
23.       i++; 
24.       if(CARD[i] == byte(0xd8)) {
25.         i++; 
26.         if(CARD[i] == byte(0xff)) {
27.           i++; 
28.           if(CARD[i] == byte(0xe1) ) {
29.             byte[] d = new byte[i]; 
30.            initPhotosave(); 
31.            
32.           }
33.         }
34.       }
35.     }
36.   }//for
37. }// initsearch
38. 
    
39. void initPhotosave() {
40.   saveBytes("picture.dat", d); 
41. }
42. 
    
43. //I'm trying to (first of all) make it so it will recognize one array of bytes as a data or binary file 
44. //so that eventually I can come up with a "for" loop that will continually save the arrays of bytes into 
45. // a series of files 
46. //However, I get nullpointer errors, and my sketch folder fills up with TMP files that have weird extensions. 
47. //I'd appreciate some advice on this, thanks. 
48.   

When reporting errors, try, if possible, to indicate where it happens.
You are doing an error which is surprisingly common: you declare a global variable (d) then when you try to use it/init it, you redeclare it (before initPhotosave() call) so you hide it with a local variable which disappears on the next closing brace!
Beside, you declare this array but it is empty, you won't save much this way.

And I would appreciate some answer to my hypotheses above.