Just to confirm - you are talking about http://www.tesnexus.com/downloads/file.php?id=27954, which applies a walk animation to the Player Character (PC) and not female NPCs?
Did you use OBMM to install Real Walks? If not, try installing Real Walks using OBMM.
If it still doesn't work, post your Load Order (use WB to produce the list) in case there is something I can spot.
Edit:
I took a look at the ESPs, and basically DMC and Real Walks conflict with each other.
If you load Real Walks before DMC, then DMC will use Umpa's sixy Walk or Vanilla walk if Umpa is not installed.
If you load Real Walks after DMC, then the Real Walk animation will be used, but the DMC animations won't apply to your character.
If you want to use both, then I suggest you use TES4Edit to change the DMC ESP to use Real Walks instead of the Umpa animation...
Change "Umpa_sixy_walk.kf" to "0Realfemalewalk.kf" and deactivate the Real Walks ESP
Or, for something simpler, try renaming "0Realfemalewalk.kf" to "Umpa_sixy_walk.kf" in the "Oblivion\Data\meshes\Characters\_male\specialanims" folder and deactivate the Real Walks ESP.
Am using BAIN (still learning the ropes

).
Yesterday found that mesh. Tracked it to characters/specialanim. Thanks for the idea with renaming. Never tried Umpa walk.
Renamed the mesh, rebuilding the patch without real walk.esp.
Will keep you informed about my misfortunes

That means my character's been walking at vanilla speed all the time and I was blaming Mur_zik... sorry!
Edit:
I downloaded the original Umpa v.06 and found out the kf animation file requires the original esp by Umpa to be loaded.
So, I created BAIN project, named it Umpa and Realk Walks for DMC
00 Core with the esp file by Umpa
01 Umpa Walk original meshes
02 Real Walk Default Speed meshes
03 Real Walk 25% Slower Speed meshes
04 Real Walk 50% Slower Speed meshes
Then renamed "0Realfemalewalk.kf" to "Umpa_sixy_walk.kf" for package 02, 03, 04 containing animation files from Real Walk by Mur_Zik.
They all work perfectly with DMC Stylish 2.1 - version for all NPC and player and DMC Sword Dancer 1.0 and DMC Stylish Jump.
Thanks to your help, Surazal, I now can enjoy not one but 4 different walks for my character.
And to think I played disabled Real Walk for over 6 months!
Big Fat Thank you. Kudos, and when you make the Sensual patch for Integration TSL, there is Fish&Chips and Guinnes for you.

Edit: found 2 corean mods tweaking Umpa and Mur_Zik's animations, created Corean Walks Pack but will test later. Too tired today - built my game, tweaked, tested.
Wrye Bash says play time 5:53. Enough is enough.