I am playing Oblivion with mods and using the Oblivion Script Extender from Silver lock. I have downloaded the files for GOG from Silverlock and I only get the OBSE.exe file. I keep getting the error message that I am missing the OBSE_1_2_416.dll file. I cannot find it anywhere. I read in one forum that I need DirectX 9 and I downloaded the June 2010 DirectX files, but I have no idea where to put them in the computer folders.
If someone could give me detailed instuctions on how to solve this, I would really appreciate it.
Thanks!

Just run the installer and let it install to the default location.

I just downloaded it from here:

http://obse.silverlock.org/

and after unzipping, I get a file named: obse_loader.exe.

Are you sure you're looking at the right download?

I have run the DirectX June 2010 setup from a folder I created on my C drive. I have run the OBSE.exe multiple times, but it doesn't change a thing.
Dr. Mike this is the one I'm using: GOG build 1.2.0.416 (download the latest loader). I've confirmed that this is the game version I have. I do have one question though, if I'm using the Unofficial Patch from Nexus mods would that change my version?
Sorry, one more edit. Does the GOG version include the Official Patches for the DLC? Maybe I need to use the autopatcher on Silverlock to override the Oblivion.exe. ?

Have you download the file named OBSE 0021 zip, if not, do that & unzip into the Oblivion directory & then put the OBSE loader for GoG into the directory again, overwriting the one that came from the 0021.zip, it might be worth a try.

Let us know how you get on

Edit: I don't have Oblivion, but have downloaded both files. Here is a pic of what they look like side by side.

I can't check this at the moment as running a backup. However follow this mod list definition, it's great and has lots of information:
https://www.nexusmods.com/oblivion/mods/47591/

You can download a zip file from:
https://www.nexusmods.com/oblivion/mods/37952/?
Or their website. The zip file will contain several files and folders, copy the required files per the instructions which are all in the zip to your oblivion folder, it will either have a plugins folder under obse folder or will create one at runtime and this is an important folder as other plugins go in there. It's been.a while since I did this so a bit hazy, but I can check tomorrow. Note that this has Nothing to do with directx, you are on the wrong line there, you just need the files and copy them into you oblivion folder. Second you don't run obse straight off, get the wrye bash program (link in the list), install that and run obse from there with all your mods in order, and installed correctly.

Follow that mod list to the letter and you should have no problems it is and excellent guide.

That did the trick Bodgeit. The .dll was in that first 0021.zip file. Thanks a million to everyone that helped me with this!!

And so the adventure begins...

*dramatic music plays*
Will the hero find the right combination of mods? Will he be able to get them to work? Will he master the skills of Wrya Bash, NMM and BOSS? Will he ever really play the game? Or will he be distracted... mislead.. by the temptations of creating the perfect game - and then ultimately failing, because he never found the time to actually play it...

Stay tuned...

No problem, glad you got it working now. Enjoy Oblivion