I was using "Localizable Strings" section in *.inf files to check if the new drivers would overlap the old ones, many of the old drivers were updated during this procedure. I checked every file within every driver package with the old ones to ensure nothing is left without notice.
from now on I would use your method ([SourceDisksFiles] and "*.cat" files) to look for necessary files as well, It would be faster your way

I also excluded "MediaSDK" folder as it seems not necessary for the base driver. (correct me if I'm wrong !)
"OpenCL" is in another folder beside the main driver folder.

I will ask more questions if happened
thanks again

If there are any files with the same name, one would need check their hash values with a program such as Nir Sofer's Hash My Files.
  Nice; he has included support for VirusTotal.   

  To see which files are required by the driver, first double-click the associated Security Catalog (.Cat) file and click the Security Catalog tab.
  Check the Catalog entries by Tag.  It's a little "clunky", yet it get's the job done.
    Confirm OS support by looking for the first occurance of the hex value 4f (8th byte from left).
      It should appear somewhat like the following, as an example:

30 82 01 32 1e 04 00 4f   0..2...O
00 53 02 04 10 01 00 01   .S......
04 82 01 22 32 00 30 00   ..."2.0.
30 00 30 00 2c 00 58 00   0.0.,.X.
50 00 58 00 38 00 36 00   P.X.8.6.
2c 00 58 00 50 00 58 00   ,.X.P.X.
36 00 34 00 2c 00 56 00   6.4.,.V.
69 00 73 00 74 00 61 00   i.s.t.a.
58 00 38 00 36 00 2c 00   X.8.6.,.
56 00 69 00 73 00 74 00   V.i.s.t.
61 00 58 00 36 00 34 00   a.X.6.4.
2c 00 37 00 58 00 38 00   ,.7.X.8.
36 00 2c 00 37 00 58 00   6.,.7.X.
36 00 34 00 2c 00 53 00   6.4.,.S.
65 00 72 00 76 00 65 00   e.r.v.e.
72 00 32 00 30 00 30 00   r.2.0.0.
38 00 52 00 32 00 58 00   8.R.2.X.
36 00 34 00 2c 00 38 00   6.4.,.8.
58 00 38 00 36 00 2c 00   X.8.6.,.
38 00 58 00 36 00 34 00   8.X.6.4.
2c 00 53 00 65 00 72 00   ,.S.e.r.
76 00 65 00 72 00 32 00   v.e.r.2.
30 00 31 00 32 00 58 00   0.1.2.X.
36 00 34 00 2c 00 53 00   6.4.,.S.
65 00 72 00 76 00 65 00   e.r.v.e.
72 00 32 00 30 00 31 00   r.2.0.1.
32 00 58 00 36 00 34 00   2.X.6.4.
2c 00 5f 00 76 00 36 00   ,._.v.6.
33 00 2c 00 5f 00 76 00   3.,._.v.
36 00 33 00 5f 00 58 00   6.3._.X.
36 00 34 00 2c 00 5f 00   6.4.,._.
76 00 36 00 33 00 5f 00   v.6.3._.
53 00 65 00 72 00 76 00   S.e.r.v.
65 00 72 00 5f 00 58 00   e.r._.X.
36 00 34 00 2c 00 5f 00   6.4.,._.
76 00 36 00 33 00 5f 00   v.6.3._.
53 00 65 00 72 00 76 00   S.e.r.v.
65 00 72 00 5f 00 58 00   e.r._.X.
36 00 34 00 00 00         6.4...

Also check the .Inf file withing [SourceDisksFiles], [SourceDisksFiles.x86] , or [SourceDisksFiles.amd64], depending upon CPU architecture.
  All files listed for that particular architecture need be included as well as the .Inf and .Cat file, or installation may fail.
    That is why some NT5 DriverPacks actually have 64bit files included.

Any files not listed within the Security catalog and .Inf file(s) might not need be integrated, and could conceivably be considered for a separate Optional 3rd-Party DriverPack should anyone not want to install MediaSDK, for whatever raisin.

The real hard part is ensuring HWID's don't overlap on incompatible hardware.

The contents of ..\MediaSDK are likely Runtimes for Intel's MediaSDK.
  Here is a link to their forum containing some whitepapers
         --> http://software.intel.com/en-us/forums/topic/311914

Are the OpenCL runtimes are included within either the driver or MediaSDK?

When you do post DriverPacks, create new Topics for each of them.     

MediaSDK
Lang
DisplayAudio

note : there are "MediaSDK" and "Lang" folders inside and outside Graphics folder.
if they are necessary, which one should i keep ?
what happens if I remove both ?

thanks in advance

http://www.mediafire.com/?npu4r4kcgf22y3w

Changelog:
12.06 Testing Mar 2013
- Update - (All) Nvidia\1 Nvidia GeForce Mobility DriverVer = 03/14/2013, 9.18.13.1422 (314.22)

http://www.mediafire.com/?hmwgql5oj5rofh9

Changelog:
12.05 Testing Mar 2013
- Update - (All) Nvidia\1 Nvidia GeForce Mobility DriverVer = 02/09/2013, 9.18.13.1407 (314.07)
- Update - (All) Nvidia\2 Nvidia Quadro Mobility DriverVer = 12/29/2012, 9.18.13.1090 (311.35)